Guide July 6, 2026 2 min read
Rune System — Slots, 16 Sets & Endgame Builds
Six slots per pet, main stat rules, 2-piece and 4-piece set bonuses, and which sets to craft first for PvE vs Arena.
Runes are the real endgame
Star level sets the ceiling. Runes decide who wins between players at the same star tier.
Each pet has 6 rune slots. Equip sets for bonus effects — most builds use 4-piece + 2-piece or 2+2+2 for stats.
Slot stat focus
| Slot | Primary stat options |
|---|---|
| 1 | HP (flat / %) |
| 2 | ATK (flat / %) |
| 3 | DEF (flat / %) |
| 4 | SPD (flat) |
| 5 | Crit Rate / Crit Damage |
| 6 | Accuracy / Resistance |
Sub-stats roll randomly on upgrade — speed, crit, HP%, ATK%, etc.
Key rune sets (planned 16 total)
| Set | 2-piece | 4-piece | Best on |
|---|---|---|---|
| Swift | +25% SPD | +20% ATK first turn | Speed lead, Specter |
| Fury | +15% ATK | +30% Crit DMG | Burst DPS |
| Will | +15% DEF | Immune debuffs turn 1 | Arena offense |
| Vampire | +15% ATK | 20% lifesteal | Solo farmer |
| Guard | +15% DEF | 15% counter | Colossus |
| Blaze | +15% ATK | +25% Burn chance | Fire comps |
| Endure | +15% HP | Survive fatal hit once | Tank |
| Nemesis | +4% ATK | ATB boost when hit | Bruiser |
Build paths by role
Campaign farmer
- 4 Vampire + 2 Fury (or Swift if too slow)
- Slot 2: ATK%, Slot 4: SPD, Slot 6: ATK% or CR
- Goal: solo clear stages for GWON efficiency
Arena speed nuker
- 4 Swift + 2 Will (or Fury)
- Max SPD slot 4, CR/CD on slot 5
- Move first, delete one enemy before they heal
Tank / bruiser
- 4 Guard + 2 Endure or 2 Guard + 2 Endure + 2 HP sets
- DEF% slot 3, HP% elsewhere, RES on slot 6 vs control teams
Controller (Hexer)
- 4 Swift or 2 Swift + 2 Accuracy sets
- Accuracy on slot 6 — land stuns vs 15% base RES + enemy RES
Upgrade priority
- +15 the farmer's slot 4 (SPD) first
- Then main stat slots (2/4/6) on DPS
- Don't grind subs on bench pets — focus 5 core units
- Keep backup runes for element-specific Arena days
Common mistakes
- Putting Will on your slowest pet (wasted immunity)
- Ignoring Accuracy on controllers — resisted skills lose the fight
- Spreading +15 across 15 pets instead of perfecting one team
- Using ×0.8 element matchup because runes are "good"
Power gap target
The game aims for ~20% win-rate swing from rune skill vs ~15% from star gap. A perfect 3★ rune build beating a naked 5★ is intentional.
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Written by
WON Legends Team