As Cernunnos kill 1 enemy God who is currently afflicted by Autumn Decay Debuff while Cernunnos is in a different stance from the Shifter of Seasons Ability.
As Discordia, use your Golden Apple of Discord ability to throw the apple to an enemy and have it spread automatically to 2 other enemies in a single cast.
As Atlas, damage 3 enemy gods with the travel portion of Gamma-Ray Burst with a single ultimate cast. This does not include gods in the initial damage area when it begins travelling.