Here's the real reason why the author of That Time I Got Reincarnated as a Slime was inspired to draw Rimuru as someone cool ...

Like the rest of the other Primordial demons in That Time I Got Reincarnated As A Slime, the demon Diablo has existed for thousands of years on end. Being all-powerful, Diablo quickly grew bored ...

Treasure goblins are how I got sucked back into Diablo 4 over Christmas ... that splits into yet more goblins when it dies, like a slime; there are gold-themed, crafting material-themed, Obol ...