Mind Durability lol

Jace summoned up all his mental strength, and formed his mind into a projectile, firing a blast of mental force at Ruric and Thar simultaneously, hoping to knock the Gruul warrior down in one psychic blow.

The backlash was immediate and blindingly painful. The force he sent at both of the ogre’s minds reflected back on him, and he was hit with the full brunt of his own spell. It knocked him down with a nauseating wave of crushing agony, and he lay there, trying to hold the sides of his head in. The Gruul warriors apparently thought that was the funniest thing they had seen all day.

***

Gatecrash: The Secretist Part 2, Aid from an Enemy