— thus; — the obtaining of the fruit of the mantra (mantra-phala-avāpti); — thus (closing quotative); — this; — the Rudrayāmala (the tantra of which this is the essence); — this; — through practice, by repeated cultivation; — attainment, perfection; — omniscience; — is obtained, is attained
Thus is the obtaining of the fruit of the mantra — this is the Rudrayāmala. Through the practice of this, attainment and omniscience are obtained.