Binding Vows are Kaizen's build-defining passive system. Each vow trades one set of stats for another, letting you specialize a character around melee damage, Cursed Energy output, survivability, or mobility. You can equip up to three Binding Vows at once, and they persist permanently in your inventory — rerolling your clan will not remove them.
Quick answer: Spins only grant Tier 1 vows. Fuse five identical Tier 1 copies into one Tier 2, then five identical Tier 2 copies into one Tier 3. That means you need 25 total copies of the same Binding Vow to reach its maximum tier.
Grade 4 Binding Vows
Grade 4 vows are the most common drops from the Binding Vow spin. Their stat swings are modest, making them low-risk picks for early builds.
| Binding Vow | Tier | Buffs | Debuffs |
|---|---|---|---|
| Swordsman | 1 | +2% Weapon Damage | -1% CE Damage, -1% Melee Damage |
| 2 | +3% Weapon Damage | -1.5% CE Damage, -1.5% Melee Damage | |
| 3 | +4% Weapon Damage | -2% CE Damage, -2% Melee Damage | |
| Strong Hands | 1 | +2% Melee Damage | -1.5% Cursed Damage |
| 2 | +3% Melee Damage | -2% Cursed Damage | |
| 3 | +4% Melee Damage | -2.5% Cursed Damage | |
| Sorcerer's Will | 1 | +2% CE Damage | -1.5% Melee Damage |
| 2 | +3% CE Damage | -2% Melee Damage | |
| 3 | +4% CE Damage | -2.5% Melee Damage |
Grade 3 Binding Vows
Grade 3 vows introduce more meaningful trade-offs, particularly around movement speed and defense.
| Binding Vow | Tier | Buffs | Debuffs |
|---|---|---|---|
| Tank | 1 | +4% Defense | -4% Walk Speed, -2.5% Global Damage |
| 2 | +5.5% Defense | -4.5% Walk Speed, -3.5% Global Damage | |
| 3 | +7% Defense | -5% Walk Speed, -4.5% Global Damage | |
| Runner | 1 | +4% Walk Speed, +2% Dash Range | -1% Weapon/Melee/CE Damage |
| 2 | +5% Walk Speed, +2.2% Dash Range | -1.5% Weapon/Melee/CE Damage | |
| 3 | +6% Walk Speed, +2.2% Dash Range | -2% Weapon/Melee/CE Damage | |
| Fragile Resolve | 1 | +3.5% Walk Speed, +7.5% Global Attack Speed | -1.5% Defense |
| 2 | +4.5% Walk Speed, +8.5% Global Attack Speed | -2.5% Defense | |
| 3 | +5.5% Walk Speed, +10% Global Attack Speed | -3.5% Defense |
Fragile Resolve stands out at Tier 3 because the defense penalty is relatively small compared to the combined walk speed and attack speed gains. It pairs well with aggressive melee builds that rely on landing hits quickly.
Grade 2 Binding Vows
Grade 2 vows shift from simple percentage swaps to conditional mechanics. Block Breaker, for instance, is a true double-edged sword.
| Binding Vow | Tier | Buffs | Debuffs |
|---|---|---|---|
| Block Breaker | 1 | Break enemy guard: +1s stun, regain 5% CE & Stamina | Your guard broken: +1s stun, lose 5% CE & Stamina |
| 2 | +1.1s stun, regain 6% CE & Stamina | +1.1s stun, lose 6% CE & Stamina | |
| 3 | +1.2s stun, regain 7% CE & Stamina | +1.2s stun, lose 7% CE & Stamina | |
| Curse Extermination Oath | 1 | +7.5% Damage vs NPCs | -5% Defense |
| 2 | +8.5% Damage vs NPCs | -6% Defense | |
| 3 | +10% Damage vs NPCs | -7% Defense | |
| Vow of One-Sided Slaughter | 1 | Every 5 combo hits: +2% Damage (max 5%) | -5% Defense, -1% CE/Melee/Weapon Damage |
| 2 | Every 5 combo hits: +2% Damage (max 6%) | -6% Defense, -1% CE/Melee/Weapon Damage | |
| 3 | Every 5 combo hits: +2% Damage (max 7%) | -7% Defense, -1.5% CE/Melee/Weapon Damage |
Curse Extermination Oath is a pure PvE pick. The 10% NPC damage bonus at Tier 3 accelerates farming significantly, and the defense hit is manageable if you stack defense through accessories and clan buffs. Vow of One-Sided Slaughter rewards sustained combos, making it strong for builds that can chain hits without interruption.
Grade 1 Binding Vows
Grade 1 vows offer more impactful effects and start to meaningfully shape how you play.
| Binding Vow | Tier | Buffs | Debuffs |
|---|---|---|---|
| Last Stand Oath | 1 | Below 40% HP: 10% Lifesteal | -5% Defense |
| 2 | Below 42.5% HP: 10% Lifesteal | -6.5% Defense | |
| 3 | Below 45% HP: 10% Lifesteal | -7.5% Defense | |
| Movement Master | 1 | +10% Dash Speed, +1 Dash Count | +10% Dash Cost |
| 2 | +12.5% Dash Speed, +1 Dash Count | +11% Dash Cost | |
| 3 | +15% Dash Speed, +2 Dash Count | +12% Dash Cost | |
| Cursed Efficiency | 1 | -10% CE Cost, +2.5% CE Damage | -2% Global Damage, -5% Stamina |
| 2 | -12% CE Cost, +3.5% CE Damage | -2.5% Global Damage, -5.5% Stamina | |
| 3 | -14% CE Cost, +4.5% CE Damage | -3.5% Global Damage, -6% Stamina | |
| Perfect Block Master | 1 | Wider Perfect Block window, +5% CE, +1s stun extension | None listed |
| 2 | Wider Perfect Block window, +6% CE, +1.1s stun extension | None listed | |
| 3 | Wider Perfect Block window, +7% CE, +1.2s stun extension | None listed |
Perfect Block Master is notable because it carries no visible downside at any tier. The wider parry window, free Cursed Energy, and extended stun on successful blocks make it one of the safest vows to push to Tier 3. Movement Master is a strong PvP complement, granting two extra dashes at Tier 3 with only a moderate increase to dash stamina cost.
Special Grade Binding Vows
Special Grade vows have a 2.5% drop rate from the Binding Vow spin. They deliver the most dramatic effects in the game but come with steep penalties, especially to defense.
| Binding Vow | Tier | Buffs | Debuffs |
|---|---|---|---|
| Berserk | 1 | Below 15% HP: heal 17.5% HP, +5% Damage for 20s | -4% Cursed Energy, -4% Global Damage |
| 2 | Below 15% HP: heal 20% HP, +5.5% Damage for 22s | -4.5% Cursed Energy, -4.5% Global Damage | |
| 3 | Below 15% HP: heal 22.5% HP, +6% Damage for 24s | -5% Cursed Energy, -5% Global Damage | |
| Overcharged | 1 | Holding skills: +6%/s Damage (cap 17.5%) | -3.5% Stamina Cost, +5% CE Cost, -5.5% Defense |
| 2 | Holding skills: +7%/s Damage (cap 18.5%) | -4.5% Stamina Cost, +7.5% CE Cost, -6.5% Defense | |
| 3 | Holding skills: +8%/s Damage (cap 20%) | -5% Stamina Cost, +10% CE Cost, -7.5% Defense | |
| Vow of Last Stand | 1 | Below 50% CE: 2x CE Regen for 20s, +8% CE Damage | -3.5% Cursed Energy, -3.5% Stamina |
| 2 | Below 50% CE: 2x CE Regen for 22s, +9% CE Damage | -4% Cursed Energy, -4% Stamina | |
| 3 | Below 50% CE: 2x CE Regen for 24s, +10% CE Damage | -5% Cursed Energy, -5% Stamina | |
| Glass Cannon Contract | 1 | +7% CE/Weapon/Melee Damage | -10% Defense |
| 2 | +8.5% CE/Weapon/Melee Damage | -12% Defense | |
| 3 | +10% CE/Weapon/Melee Damage | -14% Defense |
Glass Cannon Contract is the most universally powerful damage vow since it boosts all three damage types simultaneously. The trade-off is brutal — at Tier 3, you lose 14% Defense, which can shave roughly 1,000 HP depending on your stat allocation. Stacking defense-heavy accessories and choosing a clan with strong defense bonuses (like Mahito) helps offset this. Be aware that running Glass Cannon Contract alongside other defense-draining vows like Last Stand Oath can leave you dangerously fragile.
Berserk functions as a safety net for physical builds. The 15% HP threshold is tight, but the heal and temporary damage buff can swing a fight. The permanent -5% Global Damage penalty at Tier 3 is significant, though, since it reduces all your outgoing damage at all times — not just during the triggered window.
How to Fuse Binding Vows in Kaizen
Every Binding Vow obtained from the spin arrives at Tier 1. Fusing is the only way to upgrade them, and the process is straightforward but resource-intensive.
Step 1: Open your Inventory and navigate to the Binding Vows tab. Select the specific Binding Vow you want to upgrade.
Step 2: Press the Fuse button in the bottom-right corner. You need five identical copies of the same vow at the same tier to fuse them into one copy at the next tier.
Step 3: Repeat the process at Tier 2. Five Tier 2 copies fuse into a single Tier 3 card.
The total cost to reach Tier 3 from scratch is 25 Tier 1 copies of the same Binding Vow. That breaks down to 25 Tier 1 copies → 5 Tier 2 copies → 1 Tier 3 copy. Fusing itself costs no in-game currency, so there is no reason to hold off on fusing duplicates once you have five.
Binding Vow Spins are the primary bottleneck. You can earn free spins by redeeming Kaizen codes — the code BindingVow specifically grants 5 Binding Vow Spins along with 15 Clan Spins and a 15-minute 2x Raid Drop Chance boost. Additional codes rotate regularly, so check the settings menu (gear icon, top-left corner) to redeem them as they become available.
Build Considerations When Stacking Vows
Since you can run three Binding Vows simultaneously, defense management becomes the central challenge. Many of the strongest offensive vows — Glass Cannon Contract, Overcharged, Last Stand Oath, Curse Extermination Oath — all chip away at your Defense stat. Stacking two or three of these can drop your effective HP by a massive margin, sometimes below 4,000 even with high base stats.
One practical approach is to pair a heavy offensive vow like Glass Cannon Contract with Perfect Block Master (which has no downside) and a utility pick like Berserk or Movement Master. This gives you damage, defensive counterplay through perfect blocks, and either a clutch heal or extra mobility without tripling down on defense penalties.
Higher tiers are not always better for every vow. Some vows scale their debuffs faster than their buffs. Last Stand Oath, for example, widens the HP threshold from 40% to 45% as you move from Tier 1 to Tier 3, but the lifesteal percentage stays locked at 10% while the defense penalty climbs from -5% to -7.5%. In cases like this, running a Tier 1 version can be the smarter choice to minimize the downside while still getting the core effect.
Binding Vows are permanent inventory items. You will never lose one by rerolling your clan or swapping equipment, so feel free to experiment with different combinations without worrying about losing progress.
