
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 "{T}: Add {U}." (He's not a creature during that time.)
Hydro-Man, Fluid Felon has 4 printings, first in Marvel's Spider-Man Promos (2025). EDHREC ranks it #11,944 among Commander cards. It appears most in Doctor Octopus, Master Planner decks (1,043 on EDHREC). It has 2 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.