Rend MagicSpell 3
Source Pathfinder Impossible Magic
Traditions Arcane
Cast

Range touch
Target 1 creature
Duration up to 1 minute
You spew forth pure magical energy down your arm before releasing it in a devastating attack. Make a melee spell attack against the target's AC. If it hits, the target takes 3d10 force damage, then takes (ceil(@item.rank/2)-1)d10 force damage each time it Casts a Spell for 1 minute; on a critical hit, double the initial damage and the damage when the target casts spells. This spell ends immediately if the target ends its turn without Casting a Spell.
Heightened (+2) The initial force damage increases by 2d10, and the force damage taken whenever the target casts a spell increases by 1d10.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
AttackAn ability with this trait involves an attack. For each attack you make beyond the first on your turn, you take a multiple attack penalty.
ConcentrateAn action with this trait requires a degree of mental concentration and discipline.
ForceEffects with this trait deal force damage or create objects made of pure magical force.
ManipulateYou must physically manipulate an item or make gestures to use an action with this trait. Creatures without a suitable appendage can't perform actions with this trait. Manipulate actions often trigger reactions.