Talk:Slime Monsters/@comment-27325209-20160215040948/@comment-3157150-20160215045039

The spawn conditions of Rainbow Slimes are pretty specific, but here's the gist of what you need to know; they only spawn when you are physically within the Hallow while it's raining, however they will not spawn on Hallowed blocks. One of the easiest ways to have one spawn would be to stand just within the edges of the Hallow while it's raining with a Water Candle placed somewhere near. One of the other easy ways to have it spawn is by standing within a Hallowed Snow biome with a water candle during a blizzard, since the snow itself cannot be Hallowed/Corrupted/"Crimsoned".

The thing to remember is that without Rain or a Blizzard (technically the same weather) they won't spawn.