At the beginning of combat on your turn, you may integrate another creature you control. If you don't, tap Xavvac, Corrupter Core. Permanents you control with cards integrated onto them have lifelink and deathtouch.
As long as it's your turn, Yaeji has first strike. Whenever you amp it up, exile up to one target permanent card with mana value 3 or less from your graveyard, then create a token that's a copy of it.
Whenever you cast a spell that targets Zenith Marshal, create a 1/1 white Human creature token. If Zenith Marshal is attacking, that token enters the battlefield tapped and attacking. As long as Zenith Marshal is attacking, other creatures you control get +1/+0.
When Zombie Plague enters the battlefield, return up to one target creature card from your graveyard to your hand. {1}, Discard two cards: Each opponent loses 2 life. Create a 2/2 black Zombie creature token. It can't block this turn.