Get enchanting runes from Shadow Tower bosses, starting with Gatekeeper on Floor 5, then enhance armor at the nearby Enchant stall.
Enchanting runes are items you use to enhance armor in +1 Gun Forge. The armor selection menu points you toward their drop location with the message Runes drop in the Tower. This guide covers tower progression, boss rewards and the bonuses you can apply to your armor.
How to get enchanting runes and enchant armor in +1 Gun Forge
Enter Shadow Tower, collect runes from its bosses and bring them back to enhance your armor.
Part 1 – Enter Shadow Tower
Find the tower entrance
Take the central hub stairs toward the purple portal at the Shadow Tower entrance.
Start your tower run
Activate the portal’s interaction prompt to open Shadow Tower. The party panel displays Party 1/4, with Invite and Join a party options. Its floor selector lists 1–5, 6–10, 11–15, 16–20, 21–25, 26–30, 31–35 and 36–40. Choose Start to begin on Floor 1.
Part 2 – Collect runes from tower bosses
Clear Floors 1 through 4
Defeat every spawned wave, then use the teleporter door at the end of each floor to continue. The Floor 1 Clear! message signals that the first floor is complete. Keep clearing enemies through Floor 4, which features a swarm challenge.
Defeat Gatekeeper on Floor 5
Beat Gatekeeper and collect the enchanting rune drops after Floor 5 Clear! appears. This is the first boss clear on the climb.
Continue to higher-floor bosses
Keep climbing for more runes from bosses at five-floor intervals. On the way to the next boss, clear Floor 7’s Void Rifts and Floor 8’s fast monsters. Defeat Night Knight on Floor 10; Floor 10 Clear! marks that boss floor’s completion. The rewards for this boss clear also include a Dragon Egg.
Part 3 – Apply a rune to your armor
Return to the Enchant stall
Head back to the main plaza and interact with the purple stall marked Enchant. It stands beside the Shadow Tower leaderboard, near the stairs.
Select your armor and apply a rune
Choose the armor you want to enhance, select a rune you’ve acquired and press Enchant. For Iron Mail, an unfilled slot reads Empty; applying the Luck Rune changes the armor’s display to +4% Luck.
What rune rewards and boss stats does Shadow Tower show?
The following examples show boss stats and rune rewards from individual Shadow Tower clears.
Boss stats and rune reward examples from individual clears
| Boss and floor | Maximum health | Encounter timer | Rune rewards |
|---|---|---|---|
| Gatekeeper, Floor 5 | 529M, displayed as 529M / 529M | 02:00 | Time Rune ×1, Shadow Rune ×1, Thunder Rune ×1, Frost Rune ×1 |
| Night Knight, Floor 10 | 69.4B | 02:00 | Flame Rune ×1, Poison Rune ×2, Luck Rune ×1 |
The Floor 10 encounter takes place in a circular stone chamber, with its entrance portal ahead of you.
Farther up, Floor 14 features the Lights Out condition, and time can expire during the fight. The post-run summary displays your collected rewards and run stats; a new best of Floor 14 brings up the NEW BEST! notification.
What bonuses can enchanting runes add to armor?
| Menu option | Displayed bonus |
|---|---|
| Burn | +8% Burn |
| Luck Rune | +4% Luck |
| Time | +3 s Time |
| Slow | 4% Slow |
| Poison | +2% Poison |
| Partially displayed option | +3% Dama |
Choose an available bonus you want on your armor. Your collected runes give you the options; enchanting turns that choice into an armor stat bonus.
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