Creature - Spirit Giant 4/4, 5WW (7) {2}{W}{W}, {Q}: Target creature gains protection from the color of its controller's choice until end of turn. ({Q} is the untap symbol.)1 As it wandered Shadowmoor, it did not remember its crime—only its shame.
Illus. Heather Hudson
5/1/2008: If the permanent is already untapped, you can't activate its {Q} ability. That's because you can't pay the "Untap this permanent" cost.
5/1/2008: The "summoning sickness" rule applies to {Q}. If a creature with an {Q} ability hasn't been under your control since your most recent turn began, you can't activate that ability. Ignore this rule if the creature also has haste.
5/1/2008: When you activate an {Q} ability, you untap the creature with that ability as a cost. The untap can't be responded to. (The actual ability can be responded to, of course.)