Stunning Strike

Acquisition
'''Signet of Capture
 * Nightfall
 * Shrieker of Dread (Domain of Fear)
 * Eye of the North
 * Jadam Spearspinner (Warband of Brothers)
 * Spider Matriarch (Arachni's Haunt)
 * Timberland Guardian (Magus Stones, only during Lab Space)