Serveenas, The Masked Angel

Flying, Hexproof
Serveenas gains +1/+1 for each creature type that this creature has.
{3}{w}, Add one creature Type of your choice
to Serveenas.
{2}{w}{w}{w}{t}, Sacrifice Servenas, then create a
4/4 angel token with flying for each +1/+1 counter on this creature.