Destroy target nonwhite, nonblack creature. Create a 1/1 white Spirit creature token with flying.
Haunt (When this spell card is put into a graveyard after resolving, exile it haunting target creature.)
When the creature Seize the Soul haunts dies, destroy target nonwhite, nonblack creature. Create a 1/1 white Spirit creature token with flying.
A “nonwhite nonblack” creature is a creature that’s neither white nor black. It can be any other color or combination of colors, or it can be colorless.
If you can’t choose a nonwhite nonblack creature to target when the haunted creature is put into a graveyard, or if the target becomes illegal, you don’t get a token.