"There is power in abandon, but far more in control."
—Warden Hixus, to Kytheon

Grasp of the Hieromancer

Enchant creature
Enchanted creature gets +1/+1 and has "Whenever this creature attacks, tap target creature defending player controls."

The List

Archenemy: Nicol Bolas

Magic Origins

The enchanted creature is the source of the triggered ability it gains, not Grasp of the Hieromancer. If the enchanted creature isn’t white, that ability can target a creature with protection from white, for example.

The triggered ability granted to the enchanted creature will tap the creature before blockers are declared.