Leviathan [The Dark] Rivals of Ixalan Vampire Nocturnus and other Vampire

Vampire Nocturnus and other Vampire creatures you control get +2/+1 and have flying

as you untap your permanents

When Glistening Oil is put into a graveyard from the battlefield

Set: Visions Type: Enchantment Rarity: Uncommon Cost: {2}{B} You may cast Necromancy as though it had flash

Set: Commander 2013 Type: Instant Rarity: Rare Cost: {1}{B}{B} Split second (As long as this spell is on the stack

Leviathan [The Dark] Rivals of Ixalan Vampire Nocturnus and other VampireSet: The Dark Type: Creature Leviathan Rarity: Rare Cost: {5}{U}{U}{U}{U} Trample Leviathan enters the battlefield tapped and doesn't untap during your untap step. At the beginning of your upkeep, you may sacrifice two Islands. If you do, untap Leviathan. Leviathan can't attack unless you sacrifice two Islands. (This cost is paid as attackers are declared.)