Isekai Emperor 3

All climaxes must climax, and this is the climaxest of them all. With the help of a mysterious ally, King Reginald sends a group of elite adventurers to attack the capital city. Surrounded by allies and fortified by his firm faith in those he loves, Thomas will do the unthinkable: join his people in the counter attack. But even if they can defeat the invasion of adventurers, the Goblin King will face an uphill battle. For who sits behind Reginald? And what daunting challenges must King Thomas overcome to finally earn the title of.... ISEKAI EMPEROR?!