Hydro-Man, Fluid Felon

: This creature gets +2/-2 until end of turn.

At the beginning of your end step, if you haven't cast a spell from your hand this turn, draw a card, then discard a card.

Whenever you cast a spell with mana value 4 or greater, this creature gets +2/+0 and gains vigilance until end of turn.

Whenever you cast a noncreature spell, this creature gets +1/+0 until end of turn and can't be blocked this turn.

Whenever you cast your second spell each turn, this creature gets +2/+0 until end of turn and can't be blocked this turn.

Flying

Whenever you cast a noncreature spell, this creature gets +1/+0 until end of turn.

Whenever you cast your first instant or sorcery spell each turn, this creature gets +2/+0 until end of turn.