Anchorage Water Demon

Anchorage Water Demon enters the battlefield tapped.
{t}: Add {b} or {r} to your mana pool.
{3}{b}{r}: Until end of turn, Anchorage Water Demon becomes a 4/4 black and red Abyssal creature with menace and persist. It's still a land.
"It can't fly anymore... it can't, noyo. Do you understand?"