Altar to Poseidon

{2}, {t}, Put an offering counter on Altar: Target creature gains islandwalk until end of turn.
{3}, {t}, Remove an offering counter from Altar:
Put a legendary 4/4 red Polyphemus creature
token onto the battlefield.
{4}, {t}, Remove four charge counters from Altar:
Return all nonland permanents to their owner's
hands.