Refining gear from +0 to +12

Refining raises a weapon's damage or armor's physical defense with each success and can fail without losing the attempt's materials. The full odds table lives in the refining calculator, bound to each item's own Mirage Celestone cost.
How attempts work
Each attempt consumes Mirage Celestones — more per level as you climb. From +4 upward Tienkang Stones protect the refine level on failure; Tisha Stones enter at +11. Chance of success falls from 95% at +1 to 2% at +12.
Expected cost
Attempts to expect per success are the reciprocals of the base chances: 1.1 at +1, 4.5 at +6, 20.0 at +10. Stones shift them.
Mirage costs differ per item: Thimblerig Staves needs 6 Mirages at +1.
What refining changes
Bonuses apply per refine level: weapons gain attack, armor gains defense and HP, accessories gain their stat family. Each item rolls its refine bonus from one fixed addon in the dataset's equipment-addon table; examples from that pool:
Success chances above are community-measured base rates for this era, not client-extracted values. Extracted numbers (mirage cost, refine-bonus pool) come from the dataset pinned on the changelog.