Delina, Wild Mage

{s}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 "At end of combat, exile this creature."
15 - 20 | Create one of those tokens.
You may roll again.