Hunt the Wilds

Each player loses life equal to of the power of all creatures you controls power total. You may turn all creatures into 0/0 creatures, if you do exile them, each player gets your choice of 1, 2, 3, or 4 emblems with, "At the beginning of your upkeep, you and each opponent loses 6 life,
You may cast hunt the wilds for {g}{g}{w}{w}{w}{3} if you do, tap every land, they don't untap on there owners next untap step,