S03 - Item - Scarlet Enclave - Shaman - Elemental 4P Bonus

Chance to trigger Overload increased by an additional [s1]% and Lava Bursts damage is increased by a percentage equal to your spell critical strike chance. When Lightning Bolt or Chain Lightning deal damage, increase the damage dealt by your next Lava Burst cast within [d] by [s1]%, stacking up to [u] times.