Epigenetic inheritance factor which, in association with the Argonaute protein wago-4, mediates small RNA-directed transgenerational epigenetic inheritance and thus balances the transgenerational inheritance of epigenetic information (PubMed:29775580, PubMed:29769721). Specifically, maintains a balanced production of small RNAs by preventing the spread of epigenetic signals towards the 5'-end of target mRNAs (PubMed:29775580). Plays a role in small RNA-induced gene silencing in the germline (PubMed:29775580). ATP + H2O = ADP + H(+) + phosphate Interacts with ego-1, csr-1, wago-1 and prg-1 (PubMed:29775580). Interacts with wago-4; the interaction promotes the transmission of epigenetic information across generations (PubMed:29769721). Co-localizes with wago-4 in P-granules in germline blastomeres until the 100-cell stage (PubMed:29769721). During oocyte maturation, co-localizes with wago-4 in liquid-like condensates in the cytoplasm called Z granules (PubMed:29769721). Localizes to perinuclear and cytoplasmic P-granules in germline blastomeres and germ cells (PubMed:29775580, PubMed:29769721). In the adult germline, co-localizes with deps-1 in P-granules (PubMed:32843637). Expressed in germs cells (PubMed:29775580, PubMed:29769721). Not expressed in somatic tissues (PubMed:29769721). Expressed in germ cells at all stages of development. Defective RNA-induced gene silencing. Belongs to the ZNFX1 family.