From Path of Exile Wiki
SC is an abbreviation which may stand for either of the following:
- Softcore - Leagues with no permanent death.
- Spell Cascade SupportSpell Cascade SupportAoE, Spell, Support
Mana Multiplier: 140%Requires Level 4Supports spell skills that apply an effect to an area around a targeted location. Cannot support Vaal skills, minion skills, or skills used by totems, traps, or mines.Per 1% Quality:
Supported Skills have 0.5% increased Area of EffectSupported Area of Effect skills also affect areas in front and behind the targeted area
Supported Skills have (25-16)% less Area of Effect
Supported Skills deal (50-31)% less DamageThis is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.