...-domain horizontal gene transfer (Ghaly et al. 2022). Recent studies identified viruses of Loki-, Odin-, Thor-, and Heimdallarchaeia (Medvedeva et al. 2022;
Rambo et al. 2022; Tamarit et al. 2022; Wu et al. 2022), as well as putative transposons carrying cargo genes that replicate within Heimdallarchaeia (Wu et al...