My annoying neighbor back in New Jersey used to use the gold bird thing which you sacrifice lifepoints to give it attack and defense. And then when he would use it I would use skill drain so it would have 0 attack and defense and then destroy it costing him a shitload of lifepoints.
The one I had was named Obelisk, Can't remember what it did though.
*edit* You sacrifice two monsters, and it clears the opponents side of the field. It has 4000 and 4000.
I think you can sacrifice monsters to give it more attack and defense. That's the only one I couldn't completely fuck over with skill drain because it has 4,000 attack points.
People still used them though. I kicked my neighbors ass so much that he would start cheating and then eventually get frustrated and quit. He also loved using relinquished against me which is also a worthless piece of shit with 0 attack and defense when skill drain is activated.