Alexios, Deimos of Kosmos
Legendary Creature — Human Berserker
4 / 4
Trample
Alexios attacks each combat if able, can't be sacrificed, and can't attack its owner.
At the beginning of each player's upkeep, that player gains control of Alexios, untaps it, and puts a +1/+1 counter on it. It gains haste until end of turn.
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. You can't try to sacrifice Alexios.