The Arena serves several functions in Heroes of Gaia:
- It allows allocation of units between heroes.
- It provides a method of healing fixed % of troops lost in combat. The recovery rate of wounded units increases at a rate of 3% per Arena level, up to a maximum of 30%. Prior to Tower of Babel Expansion, this was 1%
- It allows disbanding of units currently assigned to a hero.
- It provides access to the Arena, which allows for regulated PvP combat. Units are wounded at a higher rate during Arena battles, however the percentage reported in-game is suspect.
|Level||Resources needed to upgrade||Time|
|1||18||18||9||9||180||00:02:30||5||Barracks lvl 1; Tavern lvl 1||3%|
|2||36||36||18||18||360||00:19:12||10||Barracks lvl 2; Tavern lvl 1||6%|
|3||120||120||60||60||1200||00:57:00||36||Barracks lvl 3; Tavern lvl 2||9%|
|4||360||360||180||180||3600||02:36:24||108||Barracks lvl 4; Tavern lvl 2||12%|
|5||840||840||420||420||8400||05:07:57||252||Barracks lvl 5; Tavern lvl 3||15%|
|6||1440||1440||720||720||14400||08:50:14||432||Barracks lvl 6; Tavern lvl 3||18%|
|7||2100||2100||1050||1050||21000||12:44:26||630||Barracks lvl 7; Tavern lvl 4||21%|
|8||2880||2880||1450||1440||28800||17:21:14||864||Barracks lvl 7; Tavern lvl 4||24%|
|9||3780||3780||1890||1890||37800||22:40:38||1134||Barracks lvl 8; Tavern lvl 5||27%|
|10||4800||4800||2400||2400||48000||32:00:00||1440||Barracks lvl 8; Tavern lvl 5||30%|