It should be simple enough to add a new screen showing all base monster types a player's encountered or killed in a playthrough. The easiest way to do it is probably to check Fight#originalredteam and BattleState#dead on EndFight.
This could simply be a personal-challenge/achievement thing but it can also be gamefied through an Expansive or Military Location that will grant players Minor Eidolons for every milestone (maybe every 10 monster types or so). A less meta-gaming approach would be to require 1 of a particular reagent tier #281 and then roughly double that amount with each delivery for that particular type/tier. The resulting Eidolon would be roughly the equal value of the trophies turned in - and perhaps could be chosen from any unlocked Bestiary entry.
It should be simple enough to add a new screen showing all base monster types a player's encountered or killed in a playthrough. The easiest way to do it is probably to check
Fight#originalredteamandBattleState#deadonEndFight.This could simply be a personal-challenge/achievement thing but it can also be gamefied through an Expansive or Military Location that will grant players Minor Eidolons for every milestone (maybe every 10 monster types or so). A less meta-gaming approach would be to require 1 of a particular reagent tier #281 and then roughly double that amount with each delivery for that particular type/tier. The resulting Eidolon would be roughly the equal value of the trophies turned in - and perhaps could be chosen from any unlocked Bestiary entry.