Abrielle, Involute Teenager

Whenever you cast a spell, if you do not control a creature token named “Kaidence, Easily Angered Person,” create Kaidence, Easily Angered Person,
who is a 4/1 token legendary creature with “Whenever you cast a creature spell, give it haste, deathtouch, flying, and trample. Sacrifice it at the beginning of your end step.”

If Abrielle, Involute Teenager were to leave the battlefield, sacrifice Kaidence, Easily Angered Person.