Tamashii, Soul Tied

Trample, Menace, Vigilance
This creature 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 this creature, untaps it, and puts a +1/+1 counter on it. It gains haste until end
of turn.

Whenever this creature dies its owner gains life equal to its power and its controller loses life equal
to its toughness.