Sañjaya said: Having spoken thus, oh king, the great Lord of Yoga, Hari, then showed Pārtha His supreme form of divinity.

Sañjaya narrates to Dhṛtarāṣṭra. Mahā-yogeśvaraḥ — great Lord of Yoga — capable of everything. Hariḥ — who removes miseries.

Darśayām āsa — showed — causative verb from dṛś, to make see. Pārthāya — to Pārtha, son of Pṛthā (Kuntī). Paramaṃ rūpam aiśvaram — supreme form of divinity.

Dhṛtarāṣṭra is blind, but Sañjaya has divine vision to describe what happens.