The Vault is the late-game upgrade hub that appears on your home screen once you are promoted into the Legends League, and every upgrade in it is bought with Keys — a currency you only earn from Legends League placements. It used to hold two trees; since the 2026 expansion it holds three: Power (tower stats, 223 levels), Harmony (automation and quality of life, 67 levels) and the new Enemy tree (1,080 levels that weaken specific enemy types). The trees are organized into 15 groups; two are open from the start, the rest cost Keys to unlock before you can spend on their nodes. Maxing everything adds up to 73,022 Keys — 72,577 for the node levels themselves plus 445 for the group unlocks.
How the Vault is organized
Every tree is split into groups. A group has to be unlocked with Keys first (the price is in each table caption); after that each node inside it is levelled one Key purchase at a time. The "per level" column is what one level adds; "keys / level" is the price of each of those levels, and "max levels" is how far a node goes — all three read out of the 29.0.1 build itself. Power nodes are mostly 5 levels deep, Harmony nodes are single toggles or short ladders, and every Enemy node runs 30 levels at 25 Keys each — which is why the Enemy tree alone accounts for the bulk of the 73,022-Key total.
Power is the tower-stat tree: attack, defense, economy (utility) and Ultimate Weapon boosts. Nearly every node gives +5% per level over 5 levels at 10 Keys a level; the exceptions — Defense %, Orbs, Shockwave Frequency, Death Defy, Wall Rebuild and the two enemy-skip nodes — are the ones worth planning around because they are either rarer stats or cost 20 Keys a level.
Attack (25 keys to unlock)
Upgrade
Per level
Keys / level
Max levels
Damage
+5%
10
5
Attack Speed
+5%
10
5
Critical Chance
+1%
10
5
Crit Factor
+5%
10
5
Damage / Meter
+5%
10
5
Multishot Chance
+4%
10
5
Rapid Fire Chance
+4%
10
5
Bounce Shot Chance
+4%
10
5
Super Crit Chance
+2%
10
5
Super Crit Mult
+5%
10
5
Defense (25 keys to unlock)
Upgrade
Per level
Keys / level
Max levels
Health
+5%
10
5
Health Regen
+5%
10
5
Defense %
+0.5%
20
3
Defense Absolute
+5%
10
5
Thorn Damage
+5%
10
5
Knockback Chance
+1%
10
5
Knockback Force
+5%
10
5
Orb Speed
+5%
10
5
Orbs
+1
20
2
Shockwave Size
+5%
10
5
Utility (25 keys to unlock)
Upgrade
Per level
Keys / level
Max levels
Cash Bonus
+5%
10
5
Cash / Wave
+100%
10
5
Coins / Kill
+5%
10
5
Coins / Wave
+100%
10
5
Free Attack Upgrade
+5%
10
5
Free Defense Upgrade
+5%
10
5
Free Utility Upgrade
+5%
10
5
Interest / Wave
+100%
10
5
Recovery Amount
+5%
10
5
Max Recovery
+20%
10
5
Ultimate Weapons (25 keys to unlock)
Upgrade
Per level
Keys / level
Max levels
Ultimate Damage
+5%
5
5
Chain Lightning Damage
+5%
10
5
Smart Missile Damage
+5%
10
5
Death Wave Damage
+5%
10
5
Inner Land Mine Damage
+5%
10
5
Golden Tower Bonus
+1%
10
5
Swamp Damage
+5%
10
5
Spotlight Bonus
+5%
10
5
Black Hole Size
+5%
10
5
Harmony tree
Harmony is the non-tower side: automation for cards and Ultimate Weapons, extra presets, respec discounts and sliders. Most nodes are single-purchase toggles. The two Bastion descriptions are the game's own English strings, read out of the 29.0.1 build; the rest are carried over from our earlier Vault write-up. Nodes marked — have no verified description yet.
Gameplay (unlocked from the start)
Upgrade
What it does
Per level
Keys / level
Max levels
Auto Restart Run
Automatically restart battles after being defeated.
—
20
1
Ad Gem Stack
Ad gems can stack up [2,3,5]x
×2 per level
10
4
Damage Cap Slider
—
—
25
1
Global Presets
—
+3
20
1
Cards (5 keys to unlock)
Upgrade
What it does
Per level
Keys / level
Max levels
Additional Card Slot
—
+1
5
6
Charge Berserker
—
—
5
1
Demon Mode Automation
Demon mode will activate when it's cooldown is complete.
—
10
1
Smart Demon Mode Automation
Demon mode will activate to save the tower from a killing blow.
—
25
1
Nuke Automation
Nuke will activate when it's cooled down is complete.
—
10
1
Smart Nuke Automation
Nuke will activate to save the tower from a killing blow.
—
25
1
Death Ray Toggle
—
—
15
1
Spawn Accelerator Toggle
—
—
20
1
Life Saving Ordering
—
—
50
1
Energy Shield Restriction
—
—
50
1
Ultimate Weapons (5 keys to unlock)
Upgrade
What it does
Per level
Keys / level
Max levels
Missile Barrage Automation
Missile Barrage will activate when its cooldown is complete.
—
10
1
Smart Missile Barrage Automation
Missile Barrage will activate when the tower is hit.
—
25
1
Black Hole Size Slider
—
—
25
1
Swamp Range Slider
—
—
25
1
Modules (5 keys to unlock)
Upgrade
What it does
Per level
Keys / level
Max levels
Auto Shatter Rare Modules
Unlock a toggle to automatically shatter rare modules
—
5
1
Daily Mission Shard Type
—
—
10
1
Free Mission Reroll
Unlimited free mission rerolls
—
15
1
Module Reroll Discount
—
+2.5%
5
8
Module Presets
—
+3
20
1
Bots (10 keys to unlock)
Upgrade
What it does
Per level
Keys / level
Max levels
Bot Respec Discount
Gem discount on bot respecs.
+33%
5
3
Bot Presets
+3 bot presets and removes bot respec limits
+3
20
1
Bot Range
—
+2m
10
4
Bot Cooldown Sliders
Add a slider to adjust each bots cooldown.
—
15
1
Workshop (10 keys to unlock)
Upgrade
What it does
Per level
Keys / level
Max levels
Workshop Respec Discount
—
+33%
5
3
Workshop Presets
+5 workshop presets
+3
20
1
Enhancements Discount
—
+2.5%
2
9
Workshop Orb Adjuster
Adjust the range where workshop orbs orbit the tower
—
15
1
Guardian (10 keys to unlock)
Upgrade
What it does
Per level
Keys / level
Max levels
Guardian Respec Discount
—
+33%
5
3
Guardian Presets
—
+3
20
1
Enemy tree (new)
The Enemy tree is the expansion's big addition: 36 nodes that shave 1% per level off a specific enemy type's attack, health, speed, range or radius (plus a few positive ones — Basic Coin Bonus, Boss Common Drop Chance, Saboteur Miss Chance). Every node has 30 levels at 25 Keys each, so a single maxed node is 750 Keys and a full group is 6,750 before the group unlock. Groups follow the enemy roster: Simple, Advanced, Elites and Fleets.
Simple (unlocked from the start)
Upgrade
Per level
Keys / level
Max levels
Basic Attack
-1%
25
30
Basic Health
-1%
25
30
Basic Coin Bonus
+0.01
25
30
Fast Attack
-1%
25
30
Fast Health
-1%
25
30
Fast Speed
-1%
25
30
Tank Attack
-1%
25
30
Tank Health
-1%
25
30
Tank Mass
-1%
25
30
Advanced (50 keys to unlock)
Upgrade
Per level
Keys / level
Max levels
Boss Attack
-1%
25
30
Boss Health
-1%
25
30
Boss Common Drop Chance
+0.1%
25
30
Ranged Attack
-1%
25
30
Ranged Health
-1%
25
30
Ranged Attack Range
-1%
25
30
Protector Attack
-1%
25
30
Protector Health
-1%
25
30
Protector Radius
-1%
25
30
Elites (100 keys to unlock)
Upgrade
Per level
Keys / level
Max levels
Vampire Attack
-1%
25
30
Vampire Health
-1%
25
30
Vampire Attack Speed
-1%
25
30
Scatter Attack
-1%
25
30
Scatter Health
-1%
25
30
Scatter Attack Speed
-1%
25
30
Ray Attack
-1%
25
30
Ray Health
-1%
25
30
Ray Attack Speed
-1%
25
30
Fleets (150 keys to unlock)
Upgrade
Per level
Keys / level
Max levels
Saboteur Attack Speed
-1%
25
30
Saboteur Health
-1%
25
30
Saboteur Miss Chance
+1%
25
30
Commander Pulse Effect
-1%
25
30
Commander Health
-1%
25
30
Commander Pulse Speed
-1%
25
30
Overcharge Attack
-1%
25
30
Overcharge Health
-1%
25
30
Overcharge Attack Exponent
-1%
25
30
Where the Keys come from
Keys are only awarded for Legends League tournament placements — there is no other source, which is why the Vault is paced by how often you place and how high. See the Keys page for the placement table, and the Legend battle conditions guide for what those tournaments look like.
FAQ
**How many Keys does it take to max the Vault?**
73,022 Keys across all three trees — 72,577 for the node levels and 445 for the group unlocks. The Enemy tree is 59,832 of that, by far the largest share.
**What is new in the Vault?**
The Enemy tree (36 nodes, 1,080 levels) and a group structure with unlock costs; Harmony also gained new automation and slider nodes such as the Damage Cap Slider, Black Hole Size Slider and Life Saving Ordering. Version 29 added two more Harmony nodes — Bastion Automation and Smart Bastion Automation — for the new Bastion card.
**Which Vault upgrades should I buy first?**
The automation toggles in Harmony are cheap (5–25 Keys) and change how you play immediately; in Power the 10-Key +5% nodes are the efficient bulk, and the Enemy tree is the long-term sink.