Grenth's Balance

Description
Elite Spell. If target foe has more health than you, you gain half the difference (up to your maximum health), and that foe loses an equal amount.

Acquisition
Signet of Capture:
 * Facet of Darkness (The Dragon's Lair)
 * Mragga (Frozen Forest only during The Hero's Challenge)
 * Grentchus Magnus (Nebo Terrace, during The Greatest Snowman Ever Made, could only be found during Wintersday 2005)