Ghast

Ghasts are large Hostile Mobs that spawn in the Nether and were added in Update 0.12.1. They are 4x4x4 Blocks in size and have nine tentacles. They attack by shooting Fire Charges at the Player. They drop Ghast Tears and Gunpowder.

Spawn
Ghasts spawn naturally in the Nether in any 4x4x4 area. They can also be spawned through Ghast Spawn Eggs in Creative Mode.

Behavior
Ghasts fly around in the sky, crying at regular intervals. They can usually be heard from many blocks away, even off screen. They will shoot fireballs after noticing the Player, even if they are off screen. When killed, t hey give a very loud shriek.

Combat
Ghasts attack by flying around and shooting exploding Fire Charges, which can be deflected using a Sword, or any kind of Tool, even the Players' hand (by punching it before it hits the Player), or by shooting it using an Arrow. If the deflected Fire Charge hits the Ghast, it will kill the Ghast in one hit.

Ghast fireballs destroy blocks with low Blast Resistance, and ignite the Player and flammable blocks. This is destructive to naturally spawned Biome surfaces and user-made structures.

Trivia

 * They are the second flying mob added to the game, the first being the Bat and the third being the Blaze.
 * Bug: Ghasts spawned with only of health and were naturally hostile in Creative Mode in Update 0.11.0 Beta Build 7.
 * The audio used for the Ghast is actually a recording of C418's cat making bizarre noises.
 * The Ghast is the largest Mob in the game, the second being a large Magma Cube.
 * Ghasts cannot destroy any blocks that have a Blast Resistance higher than 15. (E.g: Cobblestone)
 * Before Update 0.14.0, Ghasts didn't have an attack animation.
 * A Ghast Fire Charge hitting the frame of an unlit Nether Portal will actually re-ignite a Nether Portal.
 * Similarly, if a Ghast Fire Charge hits a lit Nether Portal, it will deactivate it.
 * Bug: In Update 0.15.0, Ghasts spawn in as giant floating Squids.

ways to kill

 * give it a taste of it's own medicine by deflecting their fireballs right back at them.