Thorn, Kuja's Jester

When Thorn enters the battlefield, you may put
a creature named Zorn, Kuja's Jester onto the
battlefield from your hand. If you don't, you may
search your library for it, reveal it and put it into
your hand, then shuffle.
Whenever Thorn deals combat damage to a
creature, attach a Venom Status Effect to it.
At the beginning of your upkeep, if you control
both Thorn, Kuja's Jester and Zorn, Kuja's
Jester, exile them both and create a legendary
7/7 Meltigemini creature token.