Auto petter

[Dreadloki]

Since it's so rare you could add a way to make one through Maru or something and have the player complete some quests to unlock it then buy it from Marnie after having Robin and Demetrius make it

 

[Quirinea]

Hmmm. Most logical could be that Fizz would sell it. (I'm shamelessly cheating with Skull cavern elevator and Timespeed so I usually soon get more than I need)

 

[Freizeitfarmer]

Since it's so rare you could add a way to make one through Maru or something and have the player complete some quests to unlock it then buy it from Marnie after having Robin and Demetrius make it

It is not rare as soon as you can go to the desert Skull Cavern:
Use luck buffs and stair cases and go at a lucky day. Then you can get Auto Petters on Treasure Rooms levels!

 

[Dreadloki]

Hmmm. Most logical could be that Fizz would sell it. (I'm shamelessly cheating with Skull cavern elevator and Timespeed so I usually soon get more than I need)

True however it would also be likely to be made and you wouldn't have to buy it every time rather make it. You could also make it a experience but reasonable difficulty to make
Though I do agree fizz would be a better option. Or Qi sells the recipe for it

 

[zack123]

I fell like maybe Qi could sell a recipe for it in the walnut room.

Buying the recipe costs 10 qi gems and a auto petter.
The recipe could be something like 50 hard wood, 10 iridium bars, 10 radioactive bars, 5 cloth or wool and 10 mystique syrup.