The Trinity is a quest in Might & Magic: Duel of Champions.
The hero (Cassandra, Seeker of Light) can place one of the monsters at the back or the front line, by placing the imperial crossbowman on the second place. The banshee summons skeletal spearman and withered ghoul. Thus, the hero has to summon the loyal griffin and have the imperial crossbowman attack the skeleton spearman. At this point, the hero has to win the battle alone, having two radiant glories in the hand.