Oracle Text

Whenever you cast a multicolored spell, Pyroconvergence deals 2 damage to any target.

Card Rulings

10/1/2012 The hybrid spells in the Return to Ravnica set are multicolored, even if you cast them with one color of mana.
10/1/2012 The triggered ability will resolve and Pyroconvergence will deal damage before that spell resolves.