Spectral Force

Oracle Text

Trample

Whenever Spectral Force attacks, if defending player controls no black permanents, it doesn't untap during your next untap step.

Card Rulings

5/1/2007 ”Your next untap…” refers to the player who controls Spectral Force when the triggered ability resolves. That means if it’s temporarily stolen (such as with Word of Seizing) and attacked with, it will untap in its previous controller’s untap step.