Defend Ur Base With Anime Merge Guide
How merging works, the critical mutation compatibility rule, and how to use the Clone Machine to build max-level units without endless gacha rolls.
Merge Rules
Same unit name required
You cannot merge two different unit types. Both units must be the same named character (e.g., two Gokus, two Kenpachis).
Same mutation required
A Gold mutation Goku and a standard Goku CANNOT be merged. Both must share the exact mutation — or both must have no mutation.
Merging increases level
Two identical units merge into one higher-level version. The higher the merge level, the more damage the unit deals and the wider its range.
New abilities unlock at milestones
Units gain new active or passive abilities at specific merge level milestones. High-merge-level Legendary and Secret units become dramatically more powerful.
Merged unit keeps traits
If one of the merging units has a trait applied, the resulting merged unit retains that trait.
Clone Machine Strategy
The Clone Machine is your most reliable path to building max-level units without relying on gacha luck for duplicate drops. It costs Fragments of the corresponding rarity tier — each rarity uses a different Fragment type that drops from enemies of that tier during waves.
The optimal Clone Machine strategy is to identify your single best unit (ideally a Legendary or higher with an S-tier Trait and a Gold or Diamond mutation) and then systematically clone it for merging. This lets you invest in one proven unit rather than spreading resources across random rolls.
King's Fortune warning: If the unit you want to clone has the King's Fortune trait equipped, both the Fragment cost and the cloning time increase significantly. If cloning costs are prohibitive, consider rerolling the trait at the Trait Machine first, then cloning, then rerolling back to King's Fortune on the merged result.
Use the Clone Fragment Calculator on this site to see exactly how many Fragments you need before committing to a clone session.
Crafting Machine Alternative
The Crafting Machine, added in the Bleach Part 2 update, offers an alternative upgrade path that does not require duplicate units at all. Instead of merging copies, you level up a unit to a qualifying threshold and then use Material Drops — items dropped by specific enemies during waves — to craft an evolved version.
The Crafting Machine is especially useful for players who rolled a strong unit early but struggle to find a duplicate in subsequent rolls. The materials required scale with the unit's rarity, so farming for Crafting Machine materials on higher-rarity units requires playing at higher wave counts where appropriate enemies appear.
Merge Priority Guide
Early Game
Merge all Common and Uncommon duplicates immediately — level gains are significant at low merge counts and there is no reason to hold multiples of early units.
Mid Game
Focus merges on your best Rare and Epic units. Avoid merging units with different mutations even if you have duplicates — save them separately for pure mutation variant merge chains.
Late Game
Use Clone Machine to build merge stacks on your best Legendary or Secret unit. Apply S-tier Trait before max merge level for compound efficiency.