What is "tamo-yogyas"

In Dvaita theology, this group of souls, classified by Shri Madhvacharya, consists of souls who are the damnable. Madhva divides souls into three classes: one class of souls which qualify for liberation ( Mukti-yogyas), another subject to eternal rebirth or eternal transmigration ( Nitya-samsarins), and a third class that is eventually condemned to non-eternal hell or Andhatamas (Tamo-yogyas).

Tamo-yogyas are positively evil in nature and wallow in sin. They are devils in human form and go to perdition. The Tamyo-Yogyas who are positively evil by nature, go on degenerating more and more by indulgence in evil actions, until the accumulated load of sins finally leads them to non-eternal hell or Naraka.