Stat Potential System
Every unit in Anime Expeditions has three stats that can be individually graded: Damage, Range, and SPA, which controls how frequently the unit attacks. Rolling a Stat Reroll assigns a fresh letter grade to all three at once, and each grade maps to a fixed multiplier range applied on top of the unit's base stats. The scale runs Z, SSS, SS, S, A+, A, A-, B+, B, B-, C+, C, C-, F from best to worst, with Z sitting above even SSS as the rarest possible outcome.
The odds are heavily weighted toward the middle of the scale. C is the single most common result at 23.5% per stat, while the top three grades, Z, SSS, and SS, land at a combined 2.7% chance. Damage grades are the most consequential, since even the worst F grade only costs a small percentage while a Z grade adds a large flat bonus, and SPA works in reverse, since a more negative multiplier means a faster attack cycle, so a good SPA roll is measured by how negative the number gets rather than how high.
Stat Potential also gates a unit's evolution eligibility and can be moved between units at higher rarities. A unit needs at least an F grade and no more than SSS to be evolve-eligible under the system's tracked range, and transferring potential from one unit to another requires the donor to be Legendary rarity or higher, with Mythic units able to transfer their potential onto a unit of any rarity. Because rerolling drains a limited pool of Stat Rerolls and accumulates worthiness toward a 20,000 cap, most players save rerolls for units they have already committed to rather than gambling on freshly summoned copies.
Details
How grading works
A single Stat Reroll rolls Damage, Range, and SPA at the same time, each independently drawing from its own 14-grade probability table. That means a unit can land a Z on Damage while getting an F on SPA in the same roll, so chasing a triple-high roll is considerably rarer than hitting one great stat. The Damage table skews positive across the board (even F only trims a small percentage), while SPA's best grades are the most negative numbers, since Speed Per Attack measures the delay between attacks and a lower number means faster hits.
Reroll and transfer strategy
Because worthiness accumulates with every roll up to a 20,000 cap and each roll costs 5,000 worthiness worth of progress, there is a practical ceiling on how many times a single unit can be rerolled through the system before diminishing returns set in. Transferring potential is the more efficient long-term play for a Mythic main damage dealer: pulling a duplicate with strong rolls and transferring that potential onto the copy already leveled and evolved skips the need to reroll the primary unit from scratch, as long as the donor meets the Legendary-or-higher rarity requirement.
Reading the S-to-Z scale
From worst to best, the full 14-grade scale runs F, C-, C, C+, B-, B, B+, A-, A, A+, S, SS, SSS, Z. The S-and-above tier, S, SS, SSS, and Z, is where a roll starts meaningfully outperforming the pack, but that whole top band only accounts for a small slice of outcomes, with S itself landing at 2.2% and Z alone at a razor-thin 0.15% per stat. Since Damage, Range, and SPA roll independently, judging a reroll by its worst grade rather than its best one is the more realistic way to gauge whether a fresh roll is worth keeping.
Stat Potential vs. Stat Anvils
Stat Potential and Stat Anvils both touch a unit's Damage and other combat stats, but they are unrelated systems on different timelines. Stat Potential is a permanent, account-level grade tied to a specific unit and rerolled with a Stat Reroll, while Stat Anvils are temporary, per-run bonuses bought inside Expedition Mode that vanish once that run ends. A unit with a strong Z-grade Stat Potential roll still starts every Expedition Mode run with zero anvil bonuses applied.
FAQ
What is the Z stat in Anime Expeditions?
Z is the single highest possible grade on the Stat Potential scale, ranked above SSS, SS, and S. It has the lowest roll chance of any grade at 0.15% per stat, and lands the strongest multiplier on Damage, Range, or SPA depending on which stat rolled it.
Is Z better than SSS?
Yes. The ordered scale places Z first, ahead of SSS, SS, and S, and its multiplier range is the strongest of any grade for every stat it applies to.
How do I reroll Stat Potential?
Select a unit and spend a Stat Reroll item to roll fresh grades for Damage, Range, and SPA simultaneously. Stat Rerolls are earned through quests, the Battle Pass, codes, and events rather than being freely available.
Can I move a good Stat Potential roll to another unit?
Yes, through the transfer system, but the donor unit must be at least Legendary rarity. Mythic-rarity donors are the only ones that can transfer their potential onto a unit of any rarity.
What is the most common Stat Potential grade?
C, landing at 23.5% per stat, making it by far the most likely single outcome on any given Stat Reroll.
Does Stat Lock protect a good roll?
Yes. Using Stat Lock before rerolling preserves the unit's current Stat Potential grade, so a subsequent Stat Reroll only affects the parts of the roll that were not locked.
Are Stat Potential and Stat Anvils the same system?
No. Stat Potential is a permanent grade tied to a unit and rerolled with Stat Reroll, while Stat Anvils are temporary bonuses bought inside Expedition Mode that reset every run.
Other systems
Source-checked
Extracted from Anime Expeditions client data (stat-potential.json). updated · GuideDex staff. Report a correction.