rudra-rūpa dhari' kare jagat saṁhāra
rudra-rūpa—the form of Lord Śiva; dhari'-accepting; kare—does; jagat saṁhāra—annihilation of the material world; sṛṣṭi-sthiti-pralaya—creation, maintenance and annihilation; icchāya—by the will; yāṅhāra—of whom.
Assuming the form of Rudra, He destroys the creation. Thus creation, maintenance and dissolution are created by His will.
Link to this page: https://prabhupadabooks.com/cc/adi/5/105