There's only one thing I remember from this novel. It's that the MC regressed, and there's this dude who's insanely powerful with a dragon mount, and the MC gets an egg more powerful than that dragon after climbing(?) a hill(?) or something. In return, the dragon who distributes those eggs asks something from him. I don't remember much, but the dragon has a basket(?) of many dragon eggs that (s)he's distributing to those who reached till it's dwelling. Oh, there's a test too, but I don't remember much. And the MC also collects many abilities of the past(future) OP figures too. Welp, that's all. I know the info is a bit lacking but I hope I get some help remembering the title. It's been bugging me much.