@MoeMoeKyun
Well, two things :
[ol]
[li] It's a korean (vr)mmorpg game, the stereotype is that the closer you are from x00 lvl, the higher exponential factor for xp level requirement. If you want an analogy, if the xp requirement was graphed (horizontal = lvl, vertical = xp requierement), it would looks like a saw blade with saw teeth.
[li] His class is of type "legendary", class differents from "normal" rank ones have higher xp requirement. it's exponential again (yeay grinding). if "normal" is factor 0 (or in math form {xp for level} = {xp requirement} * e^(0) ) , legendary would be something like factor 10 {xp for level} = {xp requirement} * e^(10) )
[/ol]