Al'Tarkak, The Warbringer

Berserkers you control have first strike and haste
If a berserker you control would die, you may
instead exile it and return it to the battlefield at
the beginning of your next upkeep. If you do, that
creature deals damage to you equal to its mana
cost.
Berserkers attack each turn if able
"My people's ways will never be forgotten"