Quicksilver - One Command Block

summon FallingSand ~ ~1 ~5 {Block:redstone_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:"fill ~ ~1 ~ ~ ~-4 ~ air"},Time:1,Riding:{id:FallingSand,Block:redstone_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:"summon FallingSand ~ ~ ~1 {Block:redstone_block,Time:1}"},Time:1,Riding:{id:FallingSand,Block:redstone_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:"summon FallingSand ~ ~ ~2 {Block:command_block,TileEntityData:{Command:scoreboard players set @a Crouch 0},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:scoreboard objectives add Crouch stat.crouchOneCm},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:execute @a[score_Crouch_min=1,score_Quicksilver=2] ~ ~ ~ fill ~1 ~1 ~1 ~-1 ~-1 ~-1 air 0 replace stained_glass_pane},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:execute @a[score_Crouch_min=1,score_Quicksilver=2] ~ ~ ~ fill ~1 ~1 ~1 ~-1 ~-1 ~-1 air 0 replace stained_glass},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:execute @a[score_Crouch_min=1,score_Quicksilver=2] ~ ~ ~ fill ~1 ~1 ~1 ~-1 ~-1 ~-1 air 0 replace glass_pane},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:execute @a[score_Crouch_min=1,score_Quicksilver=2] ~ ~ ~ fill ~1 ~1 ~1 ~-1 ~-1 ~-1 air 0 replace glass},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill ~ ~ ~-1 ~ ~7 ~-1 redstone_block},Time:1}}}}}}}"},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:"scoreboard players add @a Quicksilver 1"},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:"scoreboard objectives add Quicksilver dummy"},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:"execute @p[score_Quicksilver=2] ~ ~ ~ effect @e slowness 1 2 true"},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:"effect @a[score_Quicksilver=2] speed 1 30 true"},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:"scoreboard players set @a Quicksilver 1 {Inventory:[{Slot:100b,id:minecraft:chainmail_boots,tag:{display:{Name:Quicksilver's Boots},ench:[{id:-1}]}}]}"},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:"execute @a ~ ~ ~ detect ~ ~-1 ~ packed_ice -1 execute @p ~ ~ ~ detect ~ ~-2 ~ beacon -1 execute @p ~ ~ ~ detect ~ ~-3 ~ iron_block -1 fill ~ ~-1 ~ ~ ~-3 ~ air"},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:"execute @a ~ ~ ~ detect ~ ~-1 ~ packed_ice -1 execute @p ~ ~ ~ detect ~ ~-2 ~ beacon -1 execute @p ~ ~ ~ detect ~ ~-3 ~ iron_block -1 summon Item ~ ~ ~ {Item:{id:minecraft:chainmail_boots,Count:1b,tag:{ench:[0:{id:-1}],display:{Name:Quicksilver's Boots}},Damage:0s}}"},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:"fill ~ ~ ~1 ~ ~7 ~1 stone"},Time:1}}}}}}}}}}}}}}