Harley, Golden Menagerie

{t}: Pay target non-Human creature's converted
mana cost and create a copy of that creature on
the battlefield under your control, except it's
Luminous in addition to its other creature types.
If you use this ability while a copy already exists
on the battlefield, you must sacrifice the first
copy before the new copy enters the battlefield.
In the fierce wilds of Ikoria, a gentle child bonds with
the monsters that hunt her. Even if they're just copies,
it fills her heart with joy.