Srakahr, King of The Realm

Double strike, Flash, Teleport (Whenever this creature would die, you may pay one life. If you do, you may put
two +1/+1 counters on it and put it into The Realm.)
When Srakahr enters the battlefield, create an artefact token called "Aeonic Relic"

Spreading Madness-Whenever a creature you control leaves or enters The Realm, you may put a -1/-1 counter
on a creature and gain one life.
Through the Worlds-Whenever Srakahr deals combat damage to target creature or player