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Ring of Maniacal DevicesItem 11+

Source Core Rulebook pg. 614 2.0
Usage worn
This ring seems like simple tarnished brass, but it enhances your curiosity about traps and devices of all kinds. You can use an Interact action to pull a set of thieves’ tools from the ring. These tools appear in your hand and fold back into the ring if they would leave your possession. They grant you a +2 item bonus to Thievery checks to Disable a Device and to Pick a Lock, and the ring’s insights grant you the same bonus to Crafting checks to Craft and Repair snares and traps.

Activate 10 minutes (Interact); Frequency once per day; Effect You create a 4th-level glyph of warding containing fireball. You can have only one glyph of warding from a ring of maniacal devices active at a time, even if you have multiple rings, and the spell ends if you lose your investiture in the ring.

PFS StandardRing of Maniacal DevicesItem 11

Source Core Rulebook pg. 614 2.0
Price 1,175 gp

PFS StandardRing of Maniacal Devices (Greater)Item 18

Source Core Rulebook pg. 614 2.0
Price 4,250 gp
The ring grants a +3 bonus. Activating it creates an 8th-level glyph of warding containing your choice of either prismatic spray or 7th-level fireball.