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||13||22||11||6||180||00:02:30||5||Barracks lvl 1; Tavern lvl 1||3%|
|2||27||45||22||13||360||00:19:12||10||Barracks lvl 2; Tavern lvl 1||6%|
|3||90||150||75||45||1200||00:57:36||36||Barracks lvl 3; Tavern lvl 2||9%|
|4||270||450||225||135||3600||02:40:00||108||Barracks lvl 4; Tavern lvl 2||12%|
|5||630||1050||525||315||8400||05:49:57||252||Barracks lvl 5; Tavern lvl 3||15%|
|6||1080||1800||900||540||14400||09:08:00||432||Barracks lvl 6; Tavern lvl 3||18%|
|7||1575||2625||1312||787||21000||13:10:03||629||Barracks lvl 7; Tavern lvl 4||21%|
|8||2160||3600||1800||1080||28800||17:56:07||864||Barracks lvl 7; Tavern lvl 4||24%|
|9||2835||4725||2362||1717||37800||23:26:12||1133||Barracks lvl 8; Tavern lvl 5||27%|
|10||3600||6000||3000||1800||48000||32:00:00||1440||Barracks lvl 8; Tavern lvl 5||30%|
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