Trixx, Kwami of Illusion

Flying, Indestructible, Defender
At the beginning of your upkeep, if you don't control an artifact called Fox Necklace, exile Trixx, Kwami of Illusion. Then, if you gain control of "Fox Necklace," you may cast this card from exile.
If you control Fox Necklace at the beginning of your upkeep, create a 1/1 illusion token that has haste and “At the beginning of your upkeep, sacrifice this creature.”