Kai, the Eternal Soul

When Kai, the Eternal Soul enters the battlefield, create a legendary equipment called, Kais Dual Sword with, Equip creature has doublestrike, lifelink and afflict 2, and equip {3}{b}{g}.
{1}{b}{g}{t}: Put a Soul counter on target creature.
Creatures with Soul counters on them have, When this creature dies, return it to the battlefield with this ability.