Freeze the Nether (Overworld)

/summon FallingSand ~ ~1 ~ {Block:redstone_block,Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/fill ~ ~0 ~1 ~ ~-53 ~1 redstone_block},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~ ~3 ~1 stone},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~ ~4 ~ command_block 0 replace {Command:fill ~ ~2 ~ ~ ~-57 ~1 air}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:scoreboard objectives add Snow dummy},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:scoreboard objectives add Timer dummy},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~3 ~-48 ~-1 command_block 0 replace {Command:effect @e[name=Dinnerbone,type=Skeleton] slowness 2 1 true}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~3 ~-47 ~1 command_block 0 replace {Command:execute @a ~ ~ ~ execute @e[r=20,name=Dinnerbone,type=Skeleton,score_Timer_min=49,rym=68,ry=112] ~ ~ ~ summon Snowball ~-0.7 ~1 ~ {Motion:[-1.0,0.1,0.0],CustomName:SubSnowball}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~4 ~-46 ~-1 command_block 0 replace {Command:execute @a ~ ~ ~ execute @e[r=20,name=Dinnerbone,type=Skeleton,score_Timer_min=49,rym=23,ry=67] ~ ~ ~ summon Snowball ~-0.7 ~1 ~0.7 {Motion:[-0.5,0.1,0.5],CustomName:SubSnowball}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~4 ~-45 ~1 command_block 0 replace {Command:scoreboard players add @a Timer 1}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~5 ~-44 ~-1 command_block 0 replace {Command:scoreboard players set @a Snow 1 {SelectedItem:{id:"minecraft:snowball",tag:{display:{Name:Subzero Snowball}}}}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~5 ~-43 ~1 command_block 0 replace {Command:scoreboard players set @a[score_Snow_min=3,score_Snow=4] Snow 0}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~6 ~-42 ~-1 command_block 0 replace {Command:scoreboard players set @e[type=Item] Snow 5 {Item:{id:minecraft:prismarine_crystals,Count:4b,tag:{display:{Name:Nitrogen Crystals}}}}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~6 ~-41 ~1 command_block 0 replace {Command:scoreboard players set @a Snow 5 {SelectedItem:{id:"minecraft:potion",tag:{display:{Name:Liquid Nitrogen}}}}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~7 ~-40 ~-1 command_block 0 replace {Command:scoreboard players add @a[score_Snow_min=5] Snow 1}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~7 ~-39 ~1 command_block 0 replace {Command:scoreboard players add @e[name=Dinnerbone,type=Skeleton] Timer 1}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~8 ~-38 ~-1 command_block 0 replace {Command:execute @a ~ ~ ~ execute @e[r=20,name=Dinnerbone,type=Skeleton,score_Timer_min=49,ry=-158,rym=158] ~ ~ ~ summon Snowball ~ ~1 ~-0.7 {Motion:[0.0,0.1,-1.0],CustomName:SubSnowball}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~8 ~-37 ~1 command_block 0 replace {Command:execute @a ~ ~ ~ execute @e[r=20,name=Dinnerbone,type=Skeleton,score_Timer_min=49,rym=-157,ry=-113] ~ ~ ~ summon Snowball ~0.7 ~1 ~-0.7 {Motion:[0.5,0.1,-0.5],CustomName:SubSnowball}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~9 ~-36 ~-1 command_block 0 replace {Command:scoreboard players add @e[name=SubSnowball] Timer 1}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~9 ~-35 ~1 command_block 0 replace {Command:scoreboard players set @e[type=Item] Snow 1 {Item:{id:minecraft:snowball}}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~10 ~-34 ~-1 command_block 0 replace {Command:scoreboard players add @a[score_Snow_min=1,score_Snow=4] Snow 1}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~10 ~-33 ~1 command_block 0 replace {Command:execute @e[name=SubSnowball] ~ ~ ~ particle magicCrit ~ ~ ~ 0.1 0.1 0.1 0.1 5}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~11 ~-32 ~-1 command_block 0 replace {Command:scoreboard players set @e[name=Death] Snow 3 {OnGround:1b}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~11 ~-31 ~1 command_block 0 replace {Command:scoreboard players set @e[type=Item] Snow 4 {Item:{id:minecraft:bone}}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~12 ~-30 ~-1 command_block 0 replace {Command:execute @e[type=Item,score_Snow_min=5,score_Snow=5] ~ ~ ~ detect ~ ~-1 ~ cauldron 3 entitydata @e[type=Item,score_Snow_min=5,score_Snow=5,r=1,c=1] {Item:{id:potion,Count:1,Damage:16450,tag:{display:{Name:Liquid Nitrogen,Lore:["A substance cold enough","to be used in the Nether"]},HideFlags:63,CustomPotionEffects:[{Id:2,Amplifier:5,Duration:100},{Id:20,Amplifier:0,Duration:100}]}}}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~12 ~-29 ~1 command_block 0 replace {Command:scoreboard players set @a[score_Snow_min=8] Snow 0}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~13 ~-28 ~-1 command_block 0 replace {Command:execute @e[name=LiquidNitrogen] ~ ~ ~ detect ~ ~-1 ~ air 0 scoreboard players set @e[r=1,c=1,name=LiquidNitrogen] Snow 0}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~13 ~-27 ~1 command_block 0 replace {Command:execute @e[name=Dinnerbone,type=Skeleton] ~ ~ ~ tp @e[name=GolemHead,r=0,c=1] @e[name=Dinnerbone,type=Skeleton,r=0,c=1]}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~14 ~-26 ~-1 command_block 0 replace {Command:execute @e[name=Dinnerbone,type=Skeleton] ~ ~ ~ tp @e[name=GolemTop,r=0,c=1] @e[name=Dinnerbone,type=Skeleton,r=0,c=1]}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~14 ~-25 ~1 command_block 0 replace {Command:execute @a ~ ~ ~ execute @e[r=20,name=Dinnerbone,type=Skeleton,score_Timer_min=49,rym=-22,ry=22] ~ ~ ~ summon Snowball ~ ~1 ~0.7 {Motion:[0.0,0.1,1.0],CustomName:SubSnowball}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~15 ~-24 ~-1 command_block 0 replace {Command:execute @a ~ ~ ~ execute @e[r=20,name=Dinnerbone,type=Skeleton,score_Timer_min=49,rym=-67,ry=-23] ~ ~ ~ summon Snowball ~0.7 ~1 ~0.7 {Motion:[0.5,0.1,0.5],CustomName:SubSnowball}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~15 ~-23 ~1 command_block 0 replace {Command:scoreboard players set @e[name=Dinnerbone,type=Skeleton,score_Timer_min=50] Timer 0}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~16 ~-22 ~-1 command_block 0 replace {Command:execute @a[score_Timer_min=499] ~ ~ ~ entitydata @r[type=Item,score_Snow_min=1,score_Snow=1] {Item:{id:minecraft:snowball,Count:1b,Damage:0s,tag:{ench:[{id:3,lvl:1}],HideFlags:63,display:{Name:Subzero Snowball,Lore:["This snowball seems","somewhat special"]}}}}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~16 ~-21 ~1 command_block 0 replace {Command:execute @a[score_Snow_min=2] ~ ~ ~ entitydata @e[type=Snowball,r=2] {CustomName:SubSnowball}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~17 ~-20 ~-1 command_block 0 replace {Command:effect @e[type=PigZombie,score_Timer_min=1] 14 9999 0 true}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~17 ~-19 ~1 command_block 0 replace {Command:execute @e[name=Death,score_Snow_min=3,score_Snow=3] ~ ~ ~ kill @e[type=ArmorStand,r=3]}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~18 ~-18 ~-1 command_block 0 replace {Command:scoreboard players set @e[type=Item] Snow 4 {Item:{id:minecraft:arrow}}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~18 ~-17 ~1 command_block 0 replace {Command:execute @e[type=Item,score_Snow_min=5,score_Snow=5] ~ ~ ~ particle magicCrit ~ ~ ~ 0.1 0.1 0.1 0.1 2}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~19 ~-16 ~-1 command_block 0 replace {Command:execute @e[name=LiquidNitrogen] ~ ~ ~ particle magicCrit ~ ~ ~ 0.1 0.1 0.1 0.1 2}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~19 ~-15 ~1 command_block 0 replace {Command:scoreboard players add @e[name=LiquidNitrogen] Snow 1}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~20 ~-14 ~-1 command_block 0 replace {Command:effect @e[name=Dinnerbone,type=Skeleton] 14 2 0 true}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~20 ~-13 ~1 command_block 0 replace {Command:execute @e[name=SubSnowball,score_Timer_min=5] ~ ~ ~ effect @e[r=2] slowness 5 5 true}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~21 ~-12 ~-1 command_block 0 replace {Command:execute @a ~ ~ ~ execute @e[r=20,name=Dinnerbone,type=Skeleton,score_Timer_min=49,rym=-112,ry=-68] ~ ~ ~ summon Snowball ~0.7 ~1 ~ {Motion:[1.0,0.1,0.0],CustomName:SubSnowball}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~21 ~-11 ~1 command_block 0 replace {Command:execute @a ~ ~ ~ execute @e[r=20,name=Dinnerbone,type=Skeleton,score_Timer_min=49,rym=113,ry=157] ~ ~ ~ summon Snowball ~-0.7 ~1 ~-0.7 {Motion:[-0.5,0.1,-0.5],CustomName:SubSnowball}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~22 ~-10 ~-1 command_block 0 replace {Command:execute @e[name=SubSnowball,score_Timer_min=3] ~ ~ ~ execute @e[r=3,type=!Snowball] ~ ~ ~ playsound mob.silverfish.say @a ~ ~ ~ 1 0}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~22 ~-9 ~1 command_block 0 replace {Command:scoreboard players set @a[score_Timer_min=500] Timer 0}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~23 ~-8 ~-1 command_block 0 replace {Command:tp @e[type=PigZombie,score_Timer_min=3] ~ ~-200 ~}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~23 ~-7 ~1 command_block 0 replace {Command:execute @e[name=Death] ~ ~ ~ kill @e[score_Snow_min=4,score_Snow=4,r=4]}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~24 ~-6 ~-1 command_block 0 replace {Command:execute @e[type=Item,score_Snow_min=5,score_Snow=5] ~ ~ ~ fill ~ ~-1 ~ ~ ~ ~ cauldron 0 replace cauldron 3}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~24 ~-5 ~1 command_block 0 replace {Command:execute @a[score_Snow_min=6] ~ ~ ~ entitydata @e[type=ThrownPotion,r=2] {CustomName:LiquidNitrogen}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~25 ~-4 ~-1 command_block 0 replace {Command:execute @e[score_Snow_min=2,name=LiquidNitrogen] ~ ~ ~ setblock ~ ~ ~ water}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:gamerule commandBlockOutput false},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:"fill ~2 ~-2 ~ ~25 ~-2 ~ redstone_block"},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:"setblock ~2 ~-1 ~-1 command_block 0 replace {Command:/fill ~ ~ ~1 ~24 ~ ~1 stone 0 replace redstone_block}"},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:"setblock ~2 ~ ~1 command_block 0 replace {Command:/fill ~ ~ ~-1 ~23 ~ ~-1 redstone_block 0}"},Time:1,Riding:{id:"FallingSand",Block:stone,Time:1}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}