Emerald Counter Magic

EMERALD COUNTER MAGIC
COST: 10 or 20 motes
TARGET: Caster or one spell
The sorcerer uses Emerald Countermagic to protect herself and her companions from hostile sorcery. This spell has special timing rules. The character can shape Terrestrial Circle sorcery to cast this spell as a reflexive action that takes 0 ticks. It follows all of the other normal rules for sorcery actions, and she must take a Cast Sorcery action as her next normal action.
If the character spends 10 motes of Essence, she secures her own person against hostile magic. She crosses her arms or makes a gesture of defiance, and a nimbus of multicolored energy surrounds her. For the duration of the Cast Sorcery action and for her next action thereafter, any spell that attempts to affect her in a fashion she considers undesirable shatters and its effects are wasted.
The sorcerer can also opt to spend 20 motes of Essence and shatter a Terrestrial Circle spell operating within a radius of (the caster's permanent Essence x 50) feet. If the spell is currently being shaped, its caster is automatically interrupted. Spells currently in effect are shattered. This does not banish demons or spirits, whose summoning has already been accomplished and is no longer considered a spell.
Emerald Countermagic is not a clean or quiet process. "Shattering" a spell means that it is literally torn apart. Its effects fail, and random trivial magical effects wash out over the area. The sorcerer is safe from undesirable consequences, but others in the area may suffer minor burns or damage. The precises effects are at the Storyteller's discretion, although they should be significantly less harmful than a hostile Terrestrial Circle spell.