Ayela, Unicorn Princess

Whenever a Unicorn comes into play under
your control you may put a Flying, First Strike
or Lifelink counter on it.
Impart (When this creature dies, exile it. It becomes
an Enchantment Aura with "Enchant Creature."
Return it to the battlefield attached to target creature.)
Enchanted Creature has "Creatures you retain
any counters on them as they are exiled and
returned to the battlefield.