Yes, those are valid concerns. One alternative is to only reroll them once all artifacts have been generated, also increasing an “artifact reroll counter”. All artifacts will also internally keep a copy of this counter.

If a chest is opened contaning an artifact where artifact.counter < current counter, then discard it and generate/drop a new artifact.

Not a bug. Artifacts only appear once in a dungeon. Transmuting the last generated artifact will produce a ring instead.

Note that even artifacts from crystal chests count, even if you didn’t open it.

new stuff as in spyglass and skeleton key?

RAT-NTR-DAF

Sure, this one got Sandals on first floor.

RAT-AWW-ALO

I got these two seeds, give it a try:

RAT-PDM-AMI

NDJ-IKK-TSM

I suppose it make some sense they have some corporeal features though, how else could you attack one with regular weapons, or equip your sad ghost with a weapon and armor?

This is derived information:

A Duelist “deals X-Y damage to enemies with rigid skin”, using the pickaxe.

There is no “rigid” property in the game, and the check for rigid skin is if the foe are either inorganic, or among a small set of anthopods. ( Source ).

A Wraith has properties of being both Undead and Inorganic, and thus would practically be considered having “rigid skin” when attacked by a Duelist’s Pickaxe ability. Conclusion: Wraiths have rigid skin.

A Mimic is instead considered Demonic, so even if it might appear rigid, it’s not.

I guess this can give heroes such as Huntress a bit of an edge with talents such as Heightened Senses. Possibly also cripple some heroes that rely on their class artifacts more, such as Cleric.

Thanks for the update, I can imagine it’s quite a big undertaking creating an essentially new mini-game within the game like this.

On a related note, are you still going to implement the missing side quest for the Blacksmith at some point, or is that put on ice?