Sacrifice and Ghosts

[Wasabi Newt]

Sacrifice seems like a great spell to use with those multiplying cursed ghosts to keep thier leadership amount from going over what you can control.

Question I have though, is there a way to sacrifice a smaller amount than even level 1 sacrifice? I want to keep my ghosts managable without killing a whole bunch of them.

Seems my spellpower is too high for it's own good.