Hydroblast

(T: Add W.)

(T: Add U.)

(T: Add B.)

(T: Add R.)

(T: Add G.)

1, T: Tap target artifact, creature, or land.

Each player discards their hand, then draws seven cards.

At the beginning of your upkeep, target non-Wall creature an opponent controls gains forestwalk until your next upkeep. (It can't be blocked as long as defending player controls a Forest.)