His ultimate gives you an emblem that drains opponents whenever you gain life a deceptively simple effect that can spiral into devastating combos
Then, you draw a card for each counter on it when it enters the battlefield, all but guaranteeing you get to refill your hand or even draw extra cards if you can load it up with enough counters
Angel Angels present a divine and imposing presence, often bringing powerful abilities such as lifelink, flying, and protection
This will trigger each of your end steps and forces your foes to lose a life if anyone's creature died this turn, a nice win con in Aristocrats and Sacrifice brews
Attach a Binding Mochi to it, and Okidogi ex could potentially do 300 damage with a single attack
Thats twenty-four cards, and thats assuming you dont have any copies of Archive Trap or fetch lands