Kesia, Phoenix Paragon

Flying, vigilance, immutable (This creature's
abilities, types, and base power and toughness can't
change)
At the beginning of your upkeep, you may
discard a card. If you do, create a 2/2 white
Wraith creature token with flying.
Sacrifice 3 Wraiths: Return target creature from
your graveyard to the battlefield tapped.