Delina, Wild Mage (Promo Pack) [Dungeons & Dragons: Adventures in the Forgotten Realms Promos]

Whenever Delina, Wild Mage attacks, choose target creature you control, then roll a d20.
1—14 | Create a tapped and attacking token that's a copy of that creature, except it's not legendary and it has "Exile this creature at end of combat."
15—20 | Create one of those tokens. You may roll again.