Dr. Edward Richtofen

Primis : (You can choose as many commanders as
you want as long as they all have the ability Primis)
Respawn : (At the beggining of your upkeep,
return Dr. Edward Richtofen from your
graveyard to the battlefield under your control)
Blood gathering : Whenever a creaure an
opponent control dies, create a blood token
Blood experiment : All blood tokens that
you control gains "sacrifice this token, target
creature you control gains a +1/+1 counter"
Partner with Summoning