Shrill Chord (Su) [Flourish]

Prerequisite: HD 5, Perform (Any Music) 8+ skill points, and any song ability.
Use: 1 + 1 per 5 HD per day
Range: 40 ft.
Action: Immediate
Target: A caster that is casting a spell
Duration: Instantaneous
Saving Throw: None
Special: A flourish can be used during any song ability without ending the song.

The performer strikes a sudden, dissonant chord to disrupt a spell caster mid-casting. The performer and the target caster make opposed rolls to determine the effect. The performer rolls 1d20 + HD, while the caster rolls 1d20 + CL (caster level). If the performer’s roll is higher, the target caster loses the spell. In case of a tie, the spell casting proceeds as normal.

VTT Description Macro:
@{character_name} strikes a sudden and dissonant chord. This disrupts the target spell caster's spell. The caster must make a 1d20 + CL check against the performer's [[1d20+@{hd}]]. If the caster does not meet or beat the performer's roll, the spell is lost.