mtg zombie commander deck list COD Zombies Custom opponents lose X life where X is the number of Zombies you control Zombies - The Scarab God

What makes Thrakkus so good is when you're able to stack Thrakkus' trigger across multiple combats

I was so concerned with Kain's control effect being downside or needing to hurt the opponent that I hadn't even considered the card could instead switch sides but give you an upside when you gave him away

It will then come back from your graveyard with a -1/-1 counter on it

These are Legendary creatures with the same color identity as the deck's face card, allowing you to play them instead of the deck's original commander

Along those same lines, you've got Queen of Hearts, Sensing Weakness, who has Shift 2 and is a card draw machine