Each skill holds one trait. Nanjiang on Beginning Isle trades 5 Crystals for one reroll item. The published bands are 30% Rare, 15% Epic, 2% Legendary, and 0.1% Mythical.
Bands
| Band | Chance | Traits | What they add |
|---|---|---|---|
| Rare | 30% | Powerful, Swift, Sharp | 5% damage, 4% cooldown, or 5% crit chance |
| Epic | 15% | Berserk, Rapid, Precision | 15% damage, 8% cooldown, or 15% crit chance |
| Legendary | 2% | Executioner, Chrono, Assassin | Damage plus cooldown, cooldown plus damage, or crit chance plus crit damage |
| Mythical | 0.1% | Azure Dragon, White Tiger, Vermilion Bird, Black Tortoise | The large conditionals below |
A 0.1% chance averages about 1,000 rerolls for one specific Mythical, which is about 5,000 Crystals at 5 per reroll. That is an average from the published chance, not a guarantee. Executioner, at +25% damage and -10% cooldown, is the realistic stop for most skills.
Numbers that disagree
The stat card lists Azure Dragon at +100% damage and -20% cooldown, a further +75% damage below 50% HP, and an invincibility pierce below 30% HP. An August 29, 2026 gameplay guide lists +150% damage and a pierce below 40% HP. Vermilion Bird is -50% cooldown and +25% damage on the card, and 30% damage on that guide. Both also reset the skill's cooldown once per fight. Black Tortoise's card still says 12 seconds of invincibility. The July 11, 2026 update log changed that from 12 to 20, and the August 29 guide says 20. Use 20 seconds as the current duration.
White Tiger is +50% crit chance and +100% crit damage, then +5% crit chance per cast up to +30%. Black Tortoise is +15% healing, +30% damage, a stun on the skill, and the low-HP invincibility. It is the trait that pairs with Ruinous Sacrifice's 20 HP drain.
Do not reroll a skill you are about to replace. Crystals do not buy the Cash shop.