Requires: 20,000 gelder
RP Requirements: 3 -> 5
Effects: 10% extra gelder -> 25% extra gelder

Requires: Have all 10 hearts
RP Requirements: 7 -> 15
Effects: 1 HP restored per kill -> 2 HP. (1 heart = 8 HP)

Requires: All hearts + Lvl 60 Hip Flask
RP Requirements: 12 -> 15
Effects: 50% base chance of a heart dropping -> Up to 75% chance at low health. (Without the ring, hearts have a 40% base chance of dropping)

Requires: All hearts + Lvl 80 Hip Flask
RP Requirements: 7 -> 9
Effects: 48 seconds for 1 charge refill -> 30 seconds

Requires: Lvl 20 Hip Flask
RP Requirements: 9 -> 12
Effects: Revives with 40% health -> Revives with 100% health

Requires: Kill 2000 enemies. (Merlina can tell you how many you've killed)
RP Requirements: 12 -> 15
Effects: 5% chance critical (2x damage) hit -> 10% chance

Requires: None
RP Requirements: 5 -> 12
Effects: 4 hearts per charge -> 2 hearts per charge

Requires: Lvl 40 Hip Flask
RP Requirements: 0 -> 0
Effects: 1/4 Hip Flask refill -> 1/2 Hip Flask refill

Requires: None
RP Requirements: 5 -> 9
Effects: 2x XP gain -> 4x XP gain

Requires: None
RP Requirements: 3 -> 15
Effects: Chime when entering a room with a treasure box -> Also show hidden chests on map

Requires: All 55 rings, all 10 Mega Rings, 99 RP
Effects: Increases RP level cap from 99 to 150