Casavin, Lord of the Hunt

Reach, Vigilance
When this creature enters the battlefield or attacks, create a 2/2 green beast creature token.
{3}{w}{g} Sacrifice 1 creature. Search your library for 1 basic land card and place it on the battlefield tapped, gain life equal to the number of lands you control.
{3}{b}{g} Sacrifice 1 creature. Destroy target non-legendary permanent an opponent controls, gain life equal to its mana cost.