Ur-Ghast

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Ur-Ghast
Name	Ur-Ghast
Health	250 ( x 125)
Spawn	top floor of a Dark Tower
Drops	Ur-Ghast Trophy, Carminite, Fiery Blood
Source Mod	Twilight Forest

The Ur-Ghast is a boss mob found in the Dark Towers. The Ur-Ghast can be a formidable foe, as it flies high above the player and is difficult to damage with anything other than a ranged weapon. Its main attack is shooting four fireballs at the player, identical to the ones that normal ghasts shoot. They can be reflected back at the Ur-Ghast and deal large damage. When the Ur-Ghast has taken about 50-70 damage, it will start crying, releasing tears that damage the player upon impact, acting similar to an instant damage potion. Once defeated, the Ur-Ghast spawns a loot chest containing an Ur-Ghast Trophy, some Fiery Blood and some Carminite.

The Ur-Ghast during tantrum mode.

Dark Towers are usually found in the Dark Forest biome and are quite massive structures.

High tier armor and weapons are a must as it has a large health pool, heals, and deals a lot of damage which can be very hard to avoid. If flight is possible in your modpack/server it should be prioritized (through Morphing into a Bat, or Jetpacks from IC2, or maybe a Thaumostatic Harness from TC4 for example) as the area around the top of the tower is difficult to navigate and flight can bypass a lot of the tower maze.

The Ur-Ghast itself can be very difficult, depending on the tools that you bring. Diamond armor and weapons alone may not be enough to beat the Ur-Ghast in a single fight. It is advisable to bring some redstone and pressure plates for activating the Ghast Traps, as detailed below, as the spawned ones will frequently be destroyed by the ghast attacks. A bucket of water for putting out fires may also be useful. The Ur-Ghast also has the Rust ability, meaning it can destroy high-level armor that normally cannot be destroyed, such as Nano Armor, Solar Helmets, and even Modular Powersuits. It appears to deal the most damage to the helmet first.

The fight has several mechanics involving 4 areas spaced around the top of the tower with Ghast Trap blocks. Small Carminite Ghasts will be summoned around these Traps at random in waves of about 3-6. Every time a Carminite Ghast is killed near a Trap block, a red-colored particle beam will shoot into the Ghast Trap from the Carminite Ghast's body. After multiple Carminite Ghasts (about 2-4) have been killed, the Ghast Traps become charged - shown with smoke particle effects and a beeping note-block "alarm" sound. When charged, Ghast Traps can be activated with a redstone signal which will cause Ghost Busters inspired beams to shoot out from the top face of the Trap block, sucking in and damaging the Ur-Ghast if it is over-top the Trap, as well as killing any Carminite Ghasts around the activated Trap.

The Ur-Ghast will fly around absorbing the Carminite Ghasts to heal itself, so a good tactic is to wait nearby and activate the Trap when the Ur-Ghast gets near. Note that as the Ur-Ghast is pulled downward via the Ghast Trap, you are given a good opportunity to hit it with regular melee weapons (as the Ur-Ghast is pulled VERY close to the Trap). It may be helpful to construct a sheltered area to protect the redstone equipment from nearby attacking Ghasts.

The IC2 Mining Laser was tested and at least in 1.20.2 - it deals no damage to the Ur-Ghast.

Another tactic if you have access to flight and a large amount of ranged damage, such as 4-5 Scepters from Thaumcraft, a high level of Ars Magica, or a good bow and ammunition from Tinkers' Construct (among many others) you can "chase" the Ur-Ghast away from the tower by continually hitting it. Each hit will make it fly up and away, and by keeping it from the tower you can prevent it healing. Make sure to avoid flying below as you can be quickly killed by the Ghast Tears.

This fight was designed towards players who do not have access to flight-based gear or jetpacks, as using them during the fight completely negates the entire Ghast Trap concept, and overall makes the fight very easy since the Ur-Ghast's AI has a hard time shooting targets that are higher in the air than itself.