Sometime has past after almost everything seems to be growing extremely hard to kill, and as a result to hunt for food.
Members of an orca tribe venture into the highlands of the O'dale Isles for food. They come across a huge black obese dragon wondering about. Its so huge it looks as though it was packing more blubber than the three together, maybe even the whole tribe. It wasn't like anything they had seen before. Quickly they spread out to ambush the dragon. His clawless forepaws and obesity sure looks like this one's easy. Coming out from behind trees and hills they rush the huge dragon. They mage grows uncertain now seeing the great dragon is more than twice their size, and these orca-men are the largest tribe of the isles. Even their usual dragons don't tower over them like this. Before they know it, the spearmen and berserker get bounced off, and the great dragon now knows they here to kill him. The dragon's expression went from a caution to an eerie grin as he raise his hand. Fire begins to warp over his hand, forming a huge club made of iron. It was clear he was about to fight. The three rush in to strike again, The spearmen jabs her spear into the dragon's enormous thorny rear, but it didn't feel like it pierced his hide, it only pushed in. The berserker, unleashes his mouth foaming rage in a flurry of ki infused punch to the beasts stomach, but it doesn't seem like the dragon is slowing down or feeling hurt at all. The mage quickly casts a torrential beam of water, capable of piercing through metal, up till sometime ago, but it was the same as the spearmen's spear. For that instant it went deep into the dragon's belly, like a high speed punch or ram bulling into his belly, but it did not pierce him. The mage knows for sure that he did the most damage in that single beam than the other two, but the dragon isn't flinching. In that quick 2~3seconds the dragon's fireforged club is fully formed and he's looking at the mage, as though he's going to swing at him first.

Will they defeat the great dragon? Or will they get greedy and get crushed under his might?

Boy this reminds me of something. . . . The taking on a fat ass boss banishing a giant club part.