First cast: Sion starts channeling, increasing the damage of Decimating Smash over the next 2 seconds. If Sion's channel is interrupted by crowd control, Decimating Smash will have a reduced cooldown.

Second cast: Sion smashes his axe into the ground, dealing somewhere between a minimum of 30 / 50 / 70 / 90 / 110 (+0.45 / 0.525 / 0.6 / 0.675 / 0.75 per attack damage) and a maximum of 70 / 135 / 200 / 265 / 330 (+1.35 / 1.5 / 1.65 / 1.8 / 1.95 per attack damage) physical damage in an area in front of himself - depending on channel time - and briefly slowing enemies hit. If he charges Decimating Smash for at least 1 second, enemies hit will also be knocked up for a minimum of 1.25 seconds, up to 2.25 seconds if Decimating Smash is fully channeled. Minions take 60% damage.