Liesa, Watcher of Dusk

Partner with Sigarda, Heart of Dawn (When this creature enters the battlefield, target player may put
Sigarda into their hand from their library, then
shuffle.
Flying, first strike, lifelink
When Liesa, Watcher of Dusk enters the battlefield, choose a creature type. When a
creature you control of that type enters your graveyard, you may deal X damage to any target,
where X is that creature's power.