Belfry Spirit
{3}{W}{W}
Creature -- Spirit
1/1
Flying
Haunt (When ~this~ dies, exile it haunting target creature.)
When ~this~ enters or the creature it haunts dies, create two 1/1 black Bat creature tokens with flying.
Skeletal Vampire
{4}{B}{B}
Creature -- Vampire Skeleton
3/3
Flying
When ~this~ enters, create two 1/1 black Bat creature tokens with flying.
{3}{B}{B}, Sacrifice a Bat: Create two 1/1 black Bat creature tokens with flying.
Sacrifice a Bat: Regenerate ~this~.