This alone would make Karlov a worthy Lifegain Commander, but it can also exile creatures at instant speed, in exchange for six +1/+1 counters
And what a card it is
Sacrifice FAQs Is Totem Armor Sacrifice
You can only run so many uninkables in a deck before it becomes too unwieldy, so I think you can do better than this phony king
On top of that, Aurora, Dreaming Guardians three strength and five willpower pair with its two lore to make it a solid card by itself, able to likely withstand a few attacks in the early game - especially given that having Shift 3, allowing you to bring it out on top of another Aurora card for a lower ink cost, means you can have it on the field very early on
You could make a meme deck full of the most obscure creature types and enjoy hitting your opponents with a Mongoose for your super casual table, or you could go terrifyingly efficient for those higher-power games