Summon an explosive rune under an enemy that etches foes nearby with scrawled glyphs, dealing 4642 Magic Damage over 20 seconds.
The rune lingers on the initial target for 6 seconds before detonating, dealing 1438 Frost Damage to enemies within 7 meters. Rune detonation cannot be primed with Fulminating Rune again for 6 seconds.
Up to 3 allies near the initial target can activate the Runebreak synergy, dealing 2698 Frost Damage to enemies within 7 meters.
Deals additional area damage after a delay. Up to 3 allies can use the Runebreak synergy.