Tsuihou Kizoku wa, Hazure Skill "Kodai Shoukan" de Eirei-tachi to Henkyou Ryouchi wo Saikou suru: Eirei-tachi 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)