Kayla, Dragon Tamer

When you cast Kayla, Dragon Tamer, create a legendary 4/4 black Dragon creature token with flying named Yin, and a legendary 4/4 white Dragon creature token with flying named Yang.
When Kayla, Dragon Tamer dies, sacrifice a creature named Yin and a creature named Yang. If you do, return Kayla, Dragon Tamer from the graveyard to the battlefield.
"I'M BACK, BABY! What? Oh they're fine."
--Kayla, Dragon Tamer