Ishai, Ojutai Dragonspeaker

Flying
Whenever an opponent casts a spell, put a +1/+1 counter on Ishai.
Partner (You can have two commanders if both have partner.)

Dovin's Veto

This spell can't be countered.
Counter target noncreature spell.

Absolute Virtue

This spell can't be countered.
Flying
You have protection from each of your opponents. (You can't be dealt damage, enchanted, or targeted by anything controlled by your opponents.)

Tidus, Blitzball Star

Whenever an artifact you control enters, put a +1/+1 counter on Tidus.
Whenever Tidus attacks, tap target creature an opponent controls.

Hope Estheim

Lifelink
At the beginning of your end step, each opponent mills X cards, where X is the amount of life you gained this turn.