Leyline of the Void

If this card is in your opening hand, you may begin the game with it on the battlefield.
If a card would be put into an opponent's graveyard from anywhere, exile it instead.

Dusk Legion Sergeant

Menace
{1}{B}, Sacrifice this creature: Each nontoken Vampire creature you control gains persist until end of turn. (When it dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

Swamp

Eternal Taskmaster

This creature enters tapped.
Whenever this creature attacks, you may pay {2}{B}. If you do, return target creature card from your graveyard to your hand.

Aether Snap

Remove all counters from all permanents and exile all tokens.