Gildarts Clive is a powerful fighter and one of the top warriors in all of Fairy Tail! That being said, he is still not going to take down Natsu. Natsu has been getting stronger and stronger throughout the series to the point where he basically can’t be stopped by just about anyone. His fire burns too bright and his speed has long since surpassed Gildarts. The old generation had to step aside in the end. Natsu wins.
Suggested by iKnowledge Tsathoggua is a fairly huge monster with a whole lot of power but he has to hit you in order to use that power. That’s not very likely against someone like Gildarts. Gildarts is much faster than Tsathoggua and has a lot of dangerous abilities that could deal a whole lot of damage here. A few sword swings will do the job or one magic blast. Due to the speed difference Gildarts doesn’t have to rush though as he can just get the damage in and eventually take Tsathoggua out. Gildarts Clive wins.
DReager1.com 