Revenge Of The Blocks NO MOD (1.8)

                                          -Needed Items-

-1 Lever

-2 Command Block

-14 Redstone

-13 Stone Block

Command Block At The Bottom: 
summon FallingSand ~ ~3 ~ {TileID:91,Time:1,Motion:[0.0,0.0,0.0],R­iding:{id:Slime}}

Command Block Which İs On Top

effect @e[type=Slime,r=10] minecraft:invisibility 20000 1 1