Dun is a prefix that can appear on Jewels, providing an increase in Mana from damage taken.
If an item provides you with a 10% Damage taken Goes to Mana modifier, and you receive 40 damage, you will gain 10% * 40 = 4 mana.
Stats[]
Dun
+7-12% Damage Taken Goes To Mana
Can appear on: Magic Jewels, Rare Jewels
Item Prefixes
+ Mana — Lizard's • Snake's • Serpent's • Drake's • Dragon's • Wyrm's • Great Wyrm's • Bahamut's
+ Mana per kill — Triumphant • Victorious
Damage goes to Mana — Vulpine
+ Mana per level — Mnemonic
Jewel Prefixes
+ Mana — Zircon • Jacinth • Turquoise
+ Mana per kill — Aureolic
Damage goes to Mana — Dun