In most arena battlers, your account level (often represented as a King Tower or Base Headquarters) dictates the health and damage of your main defensive structures.

This guide will detail the most effective methods for leveling up your towers and securing that crucial hitpoint advantage.
Leveling Up the Deck
However, the ratio of gold spent to experience gained changes drastically depending on the level of the upgrade.
If your sole goal is to level up your king tower quickly, upgrading all of your low-level cards evenly is the most cost-effective method.
- Upgrade your main deck first, always.
- It is the most efficient conversion rate.
- You will run out of gold and cripple your main deck.
The Secondary Source: Clan Donations
The second most consistent way to generate base experience is by actively donating cards to your clanmates.
If you hit the daily donation limit every single day, the experience points will compound rapidly over the course of a month.
| XP Method | Value |
|---|---|
| Upgrading Low-Level Cards (Lv 1-5) | Incredibly high efficiency; the absolute best way to gain quick XP if you have a slight gold surplus |
| Upgrading High-Level Cards (Lv 12-14) | Extremely low efficiency; costs 100,000 gold for a tiny XP bump, but mandatory for competitive viability |
Why Tower Health Matters
If your king tower was one level higher, it would possess several hundred more hitpoints, turning that loss into a win.
Furthermore, higher level towers deal more damage per shot, altering crucial interactions against enemy swarms.
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