Explosive Snowballs

/scoreboard objectives add WS dummy

/fill ~3 ~-1 ~ ~ ~-1 ~ redstone_block
/fill ~3 ~1 ~ ~ ~1 ~ air

/scoreboard players add @e[type=WitherSkull] WS 1

/execute @e[type=Snowball] ~ ~ ~ /kill @e[type=WitherSkull,r=3]

/execute @e[type=Snowball] ~ ~ ~ /summon WitherSkull ~ ~ ~ {direction:[]}

/execute @e[score_WS_min=1] ~ ~ ~ /summon PrimedTnt ~ ~ ~

/scoreboard players add @e[type=WitherSkull] WS 1

/kill @e[score_WS_min=2]

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Smoke Bombs Commands:

/execute @e[score_WS_min=1] ~ ~ ~ /summon Chicken ~ ~ ~ {CustomName:"Smoke",Attributes:[{Name:generic.maxHealth,Base:300}],HealF:400,NoAI:1,Silent:1,ActiveEffects:[{Id:7,Amplifier:1,Duration:1999980,ShowParticles:0b},{Id:14,Amplifier:250,Duration:1999980,ShowParticles:0b}]}

execute @e[type=Chicken,name=Smoke] ~ ~ ~ /particle cloud ~ ~ ~ 2 2 2 0 1000

execute @e[type=Chicken,name=Smoke] ~ ~ ~ /effect @a[r=5] minecraft:invisibility 1 1 true