After casting a spell, Sylas gains a stack of Petricite Burst for 4 seconds, up to a maximum of 2 stacks.

Sylas' basic attacks consume a stack of Petricite Burst, modifying the attack to whirl his chains around him, dealing 9−60 (based on level) (+1.1 per attack damage) (+20% of ability power) magic damage to his target and 9−60 (based on level) (+0.4 per attack damage) (+20% of ability power) magic damage to nearby enemies (deals 50% less damage to minions).