Ghast

Ghasts are mobs found in the northern end of the Blazing Fortress at nighttime (9:00 PM - 5:00 AM SkyBlock time) in the sky zone near the level 9 Magma Cubes / Magma Cube Boss spawn zone or from Ghast Minions. While they deal the same damage as vanilla Ghasts, their health has been increased to 330.

Drops
They drop Ghast Tears, just like vanilla ghasts, but no Gunpowder.

Trivia

 * Back in the day, killing Ghasts spawned by Ghast Minions used to be the best method to earn Combat XP. It has been changed so that mobs on Private Islands don't give Combat XP.