10 Most Powerful Yu-Gi-Oh Monsters (In Terms Of Attack)
2. Ten Thousand Dragon
The clue for this one's in the name.
Another ? ATK Monster, Ten Thousand Dragon's ATK becomes - you guessed it - a whooping 10,000, provided it was Special Summoned by its own effect.
Admittedly, its requirement is not difficult to achieve, but Tributing Monsters whose ATK and DEF total over 10,000 is a bit risky given the Dragon's lack of inbuilt protection.
Still, the most powerful legal Monster is a guaranteed game winner on an an open Field, though even attacking a 2000 ATK monster is enough to guarantee a OTK.
Though it would have been even more powerful if its original printed ATK were 10,000 (if it's Special Summoned any other way, its ATK and DEF are 0), Ten Thousand Dragon is still a tour de force, and is able to destroy any other Monsters on this list with ease.