That adage is in full effect in a new crossover between the By the Grace of the Gods anime and That Time I Got Reincarnated as a Slime, which has characters from the former bumping into Slime protagonist Rimuru in the wild.
As for That Time I Got Reincarnated as a Slime, the long-awaited second season hits Crunchyroll on January 12, and you can see a new trailer if you missed it.
You know how the old saying goes: The more slimes the merrier.