not sure if this is how its done, but i have a challenge percy/big harem
percy/nyx/thalassa/hemera/chaos/hera/rhea/demeter/anake/selene/leto/hestia/sally/styx/hecate/zoe/calypso/tethys/reyna/hylla/gaea
also another six challenges for anyone who has played dragonball xenovers 1 and 2, your familiar with the time rifts and changes in time
well heres the challenges, a harry potter, naruto, pokemon, yu gi oh, percy jackson, and digimon fanfic where someone goes back in time to fix the altered time lines. like in xenoverse where mira and towa were trying to free demigra.