Kazuki, Touched by Madness

Trample, Haste, Doublestrike
When this creature enters the battlefield, deal 5
damage to each creature, Planeswalker, and player. Attacks each combat if able. When this creature
deals combat damage to a player, they lose life
equal to double the amount of damage dealt to
them. When this creature leaves the battlefield,
deal 5 damage to each creature, Planeswalker, and player.
{t}: Deal 5 damage to any target.