Dispel check
From Talus Wiki
A dispel check is used as a DC to see how well the caster dispels magic effects from the target.
Calculation for the dispel check is as followed:
1d20 +1 per caster level (Lesser Dispel maximum of +5, Dispel Magic maximun of +10,Greater Dispelling maximum of +15, and Mordenkainen's Disjunction maximum of +20) against a DC of 11 + the spell effect's caster level.