Celene's Skull Spirit Slaving

When Slaves of the Dead comes into play,
create three 1/1 blue Spirit tokens with flying.
Whenever a creature that has been damaged
by a Vampire you control dies create one
1/1 blue Spirit tokens with flying.
"The Baron's children that have become adept at
necromancy often have a bounty of bodies from
which they can raise up spirits to serve them."