When Ovinomancer enters, sacrifice it unless you return three basic lands you control to their owner's hand. {T}, Return Ovinomancer to its owner's hand: Destroy target creature. It can't be regenerated. That creature's controller creates a 0/1 green Sheep creature token.
Enchant creature When Vampirism enters, draw a card at the beginning of the next turn's upkeep. Enchanted creature gets +1/+1 for each other creature you control. Other creatures you control get -1/-1.