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Alliance skill Up to 30 lvl

Offensive Boost

Maximum level30
Attackup to +45%
Offensive Boost

(data current as of 2026-05-23, game version 2.12.7)

About this skill

Offensive Power is an alliance skill that sharpens the weapons: it strengthens the attack of members’ fleets and defence. Every volley hits harder, and battles end faster and in your favour.

The skill is shared and funded from the alliance’s common treasury. The higher the level, the heavier your fist — a direct combat boost for an aggressive alliance.

What the skill gives

Attack
+1.5% at lvl 1 · up to +45% at 30 lvl

Alliance skills are upgraded with shared points and apply to all members.

Bonus by level

LevelAttack
1+1.5%
5+7.5%
9+13.5%
13+19.5%
17+25.5%
21+31.5%
25+37.5%
29+43.5%
30+45%

Upgrade cost

The skill is upgraded from the shared alliance storage; the cost grows with level. Below is the total cost up to the selected level (with one skill per branch; each extra skill in the same branch multiplies the cost).

Attack
Total metal cost by level

Questions and answers

How is this connected to an alliance?
Alliances give their members shared skills, a faction choice and a rank system with permissions. More details — in the “Alliances” section.

The Xterium knowledge base is maintained by the project team; data is verified against the game engine. About the project and team →

Verified data · Game version: 2.12.7