^actually some relevant threats, like max speed charizard (both megas), max speed genesect, mimikyu, tapu lele, zygarde (which is irrelevant due to typing but can do a lot with hp ice), porygon-z pre conversion and max speed landorus-t which honestly if youre facing a max speed lando-t its most likely scarf. the most important threats here are charizard x who can otherwise one shot nihilego with earthquake or dragon stab, charizard y who threatens nihilego by lure earthquake sets as well and tapu lele who crushes it with psychic stab and probs. zygarde & landorus-t, who nihilego can nail with hp ice. honestly the last two arent as important since modest outspeeds most sets, but outspeeding both charizards and tapu lele is really important IMO.