You may have Spark Double enter the battlefield as a copy of a creature or planeswalker you control, except it enters with an additional +1/+1 counter on it if it's a creature, it enters with an additional loyalty counter on it if it's a planeswalker, and it isn't legendary if that permanent is legendary.
![Spark Double [War of the Spark] | Dumpster Cat Games](http://www.dumpstercatgames.com/cdn/shop/products/bb8a103c-b776-4501-9441-a45b90391045.jpg?v=1609847183)
