Berserker Chamimi (DBV-057) [The Decisive Battle of Valhalla]

As long as your J/ruler is "Chamimi" or "Chamimi, Guardian of the Sacred Bow", this card gains [Eternal] during your turn. Whenever another Mimi Tribe you control is put into a graveyard from the field -> Recover this card. R: This card gains [+300/0] until end of turn.