Shatter

Ice Spell, Tier 2, 2 Actions, Single Target

Range: 12. Damage: 3d6. If any die rolls the max against a Hampered target, this counts as a crit. On crit: +20 damage. Upcast: Increase the result of ANY die by 1. +5 damage on crit.

Hampered. Any creature with actions or movement reduced; e.g., Dazed, Slowed, Grappled, Restrained, Prone, in Difficult Terrain.

From Core Rules