Mind Attack Limitation

Jace tried to attack Nicol Bolas's mind.

The walls around the dragon's mind were smooth and featureless, like dark obsidian. There seemed to be no entry, nothing to even latch onto. Jace had never encountered a mind so impenetrable, except for . . . the merest moment of a memory surfaced of a mind as smooth and dazzling as a wall of crystal. But even as the thought entered his mind, it erased itself, and he could not remember where he had seen such a thing—or even what kind of thing it was.

What . . . Jace shook off the sudden fugue that had overtaken him. It hadn't seemed to come from Bolas, but rather from inside himself. What was I thinking about? But he could not recall. Bolas's mind still loomed in front of him, closed and locked, as he futilely sought purchase.

HOUR OF DEVASTATION