That Time I Got Reincarnated as a Slime Episode 15 English Subbed

Rimuru forms the Jura Forest Alliance to allow the lizardmen, goblins, and orcs to live together in harmony, inadvertently ending up as the alliance’s chancellor. Rimuru bestows the name of Geld onto the Orc Lord’s son, evolving him into Orc King and the other orcs into High Orcs. Then he gives the lizardmen chieftain a name Abiru. Later Gabiru is excommunicated and exiled from the lizardmen and embarks on a journey. Three months later, Dwarf King Gazel and his army appear at the Goblin Village to challenge Rimuru to a duel and determine his true nature. After Rimuru succeeds in block all of his strikes, and upon learning the two shared the same swordmaster (Hakurou), Gazel accepts he is not evil and offers a treaty between their groups. The Jura Tempest Federation is formed and recognized as an official nation.