Ur-Ghast

The Ur-Ghast is a boss monster added by Twilight Forest. It can be found at the top of a Dark Tower, and appears as a gigantic Ghast with many tentacles. The Ur-ghast has health points. It can attack in three different ways:

There should be several Ghast Traps in the rooms connected to the top of the tower. When the Ur-Ghast summons Ghastlings, kill them while standing near a trap to charge it. When the trap is fully charged, wait for the Ur-Ghast to fly above you and then supply a redstone signal to the trap by standing on the nearby pressure plate. This will pull the Ur-Ghast close to you and stun it, allowing you to get several melee attacks in before the effect wears off.

You can also use a ranged weapon: A Twilight Scepter with a couple of Ender Pearls to recharge can destroy the Ur-Ghast quickly.

When the Ur-Ghast is defeated, a chest will appear where the boss originally spawned. This chest contains an Ur-ghast Trophy, some Fiery Blood, and some Carminite.