Eric Porthe is a Basic Dispelling Trainer and can teach Dispel levels from 0-3.
Eric can be found Adessa - The Walls usually walking around infront of Adessa Prison, not far from the player's home Sandstone Villa, or in the Arcadium building. Eric can also be found in Adessa - The Isles in the Forum.
One user reported that, In their game, Eric Porthe was labeled as a persuasion trainer on the map even though he still acted as a dispelling trainer. However, there is a persuasion trainer Templar Montainel in the Forum, where Eric is sometimes located, and may be the source of confusion.