High Tide

Until end of turn, if a player taps a nonbasic land for mana, it produces colorless mana instead of any other type.

Whenever you cast a blue spell, if Hydro-Man is a creature, he gets +1/+1 until end of turn.

At the beginning of your end step, untap Hydro-Man. Until your next turn, he becomes a land and gains ": Add ." (He's not a creature during that time.)

Choose one —

• Target creature gains islandwalk until end of turn. (It can't be blocked as long as defending player controls an Island.)

• Target creature gets +2/-1 until end of turn.

• Target player discards a card.

Creatures your opponents control get -2/-0 until end of turn.

: Add . Spend this mana only to cast an enchantment spell, unlock a door, or turn a permanent face up.

Until end of turn, target creature gets +0/+2 and another target creature gets -2/-0.