> For the complete documentation index, see [llms.txt](https://docs.etherforge.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.etherforge.io/etherforge-core-gameplay/pvp-battle-system/hero-and-monster-upgrade-system.md).
# Hero and Monster Upgrade System
## 1/ Overview
The upgrade system in EtherForge allows players to enhance the power of their Heroes and Monsters by consuming in-game resources and $ETHER energy.
Each Hero or Monster has a unique stat that can be upgraded from Lv 1 → Lv 10, representing long-term progression and evolution over time.
### Level Progression by Rarity Tier
Each rarity tier determines the growth rate and the $ETHER upgrade cost, helping maintain economic balance between new players and high-investment players.
{% hint style="info" %}
This upgrade progression encourages strategic investment, allowing players to optimize their lineup for both PvE efficiency and PvP dominance.
{% endhint %}
### Cost table for upgrading heroes and monsters
#### 🟦 Rare Tier
Level (Stats)
Buff Per Level
Stats Multiplier (X)
Upgrade Cost ($ETHER)
1
0.07
1.07
120
2
0.07
1.14
150
3
0.08
1.23
190
4
0.09
1.31
240
5
0.09
1.40
310
6
0.10
1.50
400
7
0.11
1.61
520
8
0.11
1.72
680
9
0.12
1.84
880
10
0.13
1.97
1010
#### 🟪 Epic Tier
Level (Stats)
Buff Per Level
Stats Multiplier (X)
Upgrade Cost ($ETHER)
1
0.09
1.19
160
2
0.10
1.28
200
3
0.10
1.39
250
4
0.11
1.50
310
5
0.12
1.62
400
6
0.13
1.75
520
7
0.14
1.89
680
8
0.15
2.04
880
9
0.16
2.20
1140
10
0.18
2.37
1310
#### 🟧 Legendary Tier
Level (Stats)
Buff Per Level
Stats Multiplier (X)
Upgrade Cost ($ETHER)
1
0.11
1.31
200
2
0.12
1.43
260
3
0.13
1.55
320
4
0.14
1.69
410
5
0.15
1.85
530
6
0.17
2.01
680
7
0.18
2.19
880
8
0.20
2.39
1160
9
0.22
2.61
1500
10
0.23
2.84
1720
#### 🟥 Mythic Tier
Level (Stats)
Buff Per Level
Stats Multiplier (X)
Upgrade Cost ($ETHER)
1
0.13
1.43
280
2
0.14
1.57
350
3
0.16
1.73
440
4
0.17
1.90
550
5
0.19
2.09
720
6
0.21
2.30
920
7
0.23
2.53
1200
8
0.25
2.79
1560
9
0.28
3.07
2020
10
0.31
3.37
2320
## 2/ Token Deflation Mechanism
The upgrade system serves as a core $GENESIS token sink, helping control supply and increase scarcity. Specifically, 100% of the $ETHER spent by players on upgrades is converted into $GENESIS and permanently burned, forming an effective deflationary loop that:
* Maintains long-term token value stability
* Drives continuous and sustainable on-chain activity
* Aligns player progression with the increasing scarcity of resources
This mechanism ensures the EtherForge economy remains self-sustaining, value-balanced, and durable over the long run.
---
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