Lukamina, Crocodile Form

Legendary Creature — Crocodile Druid

When this creature specializes, tap target nonland permanent an opponent controls. That permanent doesn't untap during its controller's untap step for as long as you control Lukamina, Crocodile Form. When Lukamina, Crocodile Form dies, it unspecializes. If it unspecializes this way, return it to the battlefield tapped.