Some number of seconds pass and then the grasping magic reaches for Mahdi. 

He's not even sure he wants to fight with whoever just cast what he is reasonably confident was a quickened heightened mass hold person followed by two heightened plane shifts but it's kind of a reflex, to try to bat the spell away with force of will - it works -

- if he can snap the paralysis too he can do one short teleport, 300 feet, without preparing anything, he can steal Hagan's nondetection - sorry Hagan - vanish from here and hope they think he went farther -

- he shoves it loose of his head and can feel that he got very lucky there -

- another goddamned heightened plane shift and Hagan disappears so he won't have the amulet but it's just barely possible it will still take them longer to track him than it'll take him to prepare a real Teleport - 

- and then four more normal Hold Person spells crash into him from different directions. 

He does not actually resist the next Plane Shift because, come on, it has got to be the local Leareth. 

Right?