Tensei shitara Slime Datta Ken - episode 12 - 17 Dec, 2018

Treyni explains that the Orc Lord has used a unique skill "Starved" on the Orcs, causing them to constantly crave sustenance, go berserk, and even eat their own to gain more power. Accepting Treyni's request, Rimuru sends Souei to negotiate with the lizardmen for an alliance. As the chieftain urges his soldiers not to engage in battle with the orcs until Rimuru's group arrives, Gabiru, swayed by the words of Gelmud's messenger Laplace, usurps the chieftain's position and leads the lizardmen into a direct attack on the orcs, unaware of the Orc Lord's true power. (Source: Wikipedia)