any way to upgrade items?

[FilthFace]

im not talking about using the anvil to increase HP but to increase from common all the way up to legenday. i know a guy does it in the village but he seems to only do weapons or only melee weapons.

[LustrousTroll]

the guy in the village does not increase tier. i thought that to by the shop interface and the way he wording things. but no

the dude in the village just applies a sharpness enchantment. 40%dmg "high tier" you get higher tier items by farming them as drops for the corresponding npc that drops them or by making said item repeatedly, im not even sure if the legendary status on a workbench increase "tier" odds when crafting. i think its just a modifier for dmg, sell value.

[WitchDR]

at the western entrance to Snowed Inn walking around the Jail (town in snow area), theres an NPC Flint Burntheart who adds a up to 80 Fire dame plus 5 seconds burn affect, it can combine with the 40% damage boost, i'm wondering if there's another NPC out there with electric boost

[gamerplayer31]

there are so far as i was tracking, a base dmg buff (village smith), electric dmg (palace after leyasoon fight), poison buff (old lady screaming deep swamp), freezing buff (lighthouse after bell apex).
the fire is new to me. might see if it adds on to the stack of buffs on my zero iron.
One thing that intrigues me, haven't really tried, was seeing if i can buff a ammo stack, then maybe my shots can do more?
As other means of upgrades, there is.. clothing that can boost atk, movement speed (it really does speed up your atk)