A spider accidentally went through a Nether Portal. It unwittingly crawled into the mouth of a Ghast, and was swallowed. After a short while, the Ghast began to twitch and moan. It diminished in size, and it's number of tentacles were reduced to six, three on each side of it's newly segmented body. The tentacles hardened and straightened into legs. Now the Ghastid and it's brood lurk in the Nether, waiting for unsuspecting players to make portals...portals to another world...a world to take over.

Note:
This took an hour to create, including the writing and the skin.