A type of Labdhi (supernatural power);
that supernatural spiritual power obtained through yoga (spiritual practices like Tapa, Dhyāna etc.), by dint of which one can cause harm to others through a curse.
ete hi tapaścaraṇānuṣṭhānato'nyato vā guṇata āśīviṣavṛścikabhujaṅgādisādhyakarmakriyāṃ kurvanti- śāpapradānādinā paraṃ vyāpādayantītyarthaḥ.
(ViBhā 780 Vṛ p.323)