Disciplined Talent [Multiclass Psion]

Heroic Tier
Prerequisite: Int 13
Benefit: You gain training in one skill from the psion’s class skills list.
Choose one 1st-level psion at-will attack power. You can use that power once per encounter, and you can’t augment it.
    In addition, you can wield psion implements.

Published in Player's Handbook 3, page(s) 193.