Text (GP+errata): 0/3, Defender. ; Whenever ~this~ blocks a creature, tap that creature. That creature doesn't untap during its controller's next untap step. [Oracle 2009/07/08]
If the creature was already tapped, it still doesn't untap during its controller's next untap step. [Guildpact FAQ 2005/12/22]
If two of these block a creature, the "doesn't untap" is not cumulative. Both apply to the same untap step. [Guildpact FAQ 2005/12/22]
