If an effect instructs you to sacrifice a creature and you control any creatures other than Alexios, you must sacrifice one of those other creatures
Whenever a creature you control dies you can kindly ask an opponent if you can get your humble creature back, and if they decline then they lose three life
Whenever a modified creature you control leaves the battlefield, put a +1/+1 counter on this artifact
Fiend Hunter and Palace Jailer are the clearest examples of solid, budget-friendly removal that's good for flickering, but most of the others aren't great as they're more in the vein of the temporary Banisher Priest
When these creatures do combat damage, they also provide you with card draw
If youve got a way to proliferate the same turn you cast this, you can maximize your token production