Rain Slime

The Slime is a mob in SkyBlock. Slimes spawn naturally in the Slimehill section of the Deep Caverns. Slimes come in three different sizes, each with increasing levels, health, and damage. They can also spawn in the Spider's Den when it is raining, in the area where skeletons spawn, at the base of the mountain. Slimes that spawn in the Spider's Den give the player only +4 XP, regardless of size. Slimes that spawn in the deep caverns, however, can give between 13.8 and 23 XP.

This mob deals 70 at level 5, 100 at level 10, and 150 at level 15.

Slimes drop from 1 to 2 Slimeballs upon being killed, which can be used for crafting recipes.

Strategy
Since slimes do not multiply upon death, players will not have to worry about that when dealing with them. Some of the larger slimes have a lot larger reach than they seem to, so if the player does not have much Effective and can get one-shot by them, the player should probably fight them from afar with a bow.