This marvelous assembly turns a simple counterspell into a veritable tidal wave of Merfolk! When Lullmage Mentor steps up to counter an opponent's spell using its crew of seven, its own triggered ability normally rewards you with a single token, but the mathematical synergy of Ojer Taq, Deepest Foundation, Primal Vigor, and Doubling Season explodes that reward into twelve tokens instead. That massive influx more than replaces the seven tappers with plenty to spare, leaving you with a self-sustaining loop that continuously locks down your opponents' spells while filling your board to the brim.