Ball Tower Defense Reforge Cost Calculator

The Ball Tower Defense reforge cost calculator estimates total gem spending based on unit rarity and desired roll count. Reforging is one of the largest gem sinks after crate banners—plan carefully using data from the reforge traits guide.

Reforge Cost by Rarity

Normie and Odd units cost 20 gems per roll. Rare units cost 30. Awesome units jump to 100 gems. Legendary reforges cost 150, Mythic 200, and Transcendent or Omega units cost 250 gems each attempt. These values match the in-game Forge NPC near map selection.

Budgeting Strategy

Reforge your primary DPS and support units first—typically one Mythic or Omega damage dealer and one Party Man. Use leftover gems for secondary units. Pair calculated budgets with gem income from the gem farming guide and avoid reforging low-tier units you will replace soon according to the tier list.

Trait Priority by Unit Role

DPS units benefit most from Strength and Reflexes traits detailed on the reforge traits page. Support units like Party Man gain value from Party Hat and range-extending traits. Farm units prioritize Money Printer and on-kill cash traits. The calculator shows gem costs—trait selection requires reading full trait descriptions because random rolls may take many attempts.

Expected Roll Counts

Community averages suggest budgeting 5–15 rolls for a usable trait on Mythic units, and potentially more for Omega rarities at 250 gems per attempt. That means 1,250–3,750 gems for a single optimized Omega reforge session. Save accordingly using farming routes on advanced maps before committing.

When Not to Reforge

Do not reforge Normie or Rare units you will replace within days. Do not reforge before verifying a unit belongs in your long-term team via the unit tier checker. Codes may eventually provide gem bundles—monitor our codes page before spending hard-earned gems during promotional events.