To proliferate, choose any number of permanents and/or players, then give each another counter of each kind already there
Instead of playing it out, I will just concede
Exile is more a designer's tool than an evergreen mechanic, so I hope you learned some nuances about it today
This flexible board wipe is super strong for getting rid off as many things as give you trouble and you keep where you are at parity or have the advantage
Then that forced sacrifice makes Thraximundar grow
As with Sacrifice, Burnt Offering is great with cards that have high mana values that you can play on the cheap, such as those with Affinity or those that cost substantially less if you fulfill a certain condition, like Emrakul, the Promised End, Avatar of Fury, or Avatar of Woe