Taught by Narset is a common Enchantment — Aura card from Unknown Event (UNK), collector number CU12b.
Commander enchantment (This aura enchants a commander creature, and remains attached to the creature as it moves between any face-up zones. You can cast it on a Commander in your command zone.) When you cast Taught by Narset, draw a card. Enchanted creature has prowess and ward {2}.