Super fun!!!
The NPC vendors help it to be one of the best and most creative progress systems I've seen so far in these kind of games.~Edit: Oh, no!... I Found a sad thing now... We cannot mix 3 Elder weapons 😁😁😁
Thank you very much ! :D, it is true for now we can't mix tier 3 weapons, but once you unlock the merge, you will be able to try it with every weapons !
