TSUIHOU KIZOKU WA, HAZURE SKILL [KODAI SHOUKAN] DE EIREITACHI TO HENKYOU RYOUCHI WO SAIKOU SURU: EIREITACHI WO SHOUKAN SHITARA SHITAWARETA NODE, SAIKYOU RYOUCHI WO TSUKURIAGEMASU

Dilluk received a useless skill known as "Ancient Summoning," but he managed to work his way up to be the king's advisor anyway. But then he was demoted to be the lord of a village in ruin in the middle of nowhere, all because of a co-worker's scheme. When he witnesses the sorry state of his new territory, "Ancient Summoning" awakens! He summoned a hero from 4000 years ago! The heroes have unbelievable powers and he will work with them to create the greatest territory! (Source: Starts Shuppan, translated) — Description from AniList community (anilist.co).