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.

Therefore, understanding exactly how to efficiently generate account experience points (XP) is vital for long-term survival on the ladder.
Leveling Up the Deck
Every time you spend gold to increase a card's level, you are rewarded with a burst of experience points.

Upgrading a card from level one to level two costs virtually nothing and provides a very high amount of XP per gold coin spent.
Complete the specific tasks associated with each troop.Spells rely heavily on level interactions.Gold is the ultimate bottleneck for base progression. 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.
Experience SourceEfficiencyUpgrading Low-Level Cards (Lv 1-5)Incredibly high efficiency; the absolute best way to gain quick XP if you have a slight gold surplusMaxing OutExtremely low efficiency; costs 100,000 gold for a tiny XP bump, but mandatory for competitive viability The Margin of Victory
You might wonder if grinding out that next account level is truly worth the massive gold investment.

A higher level tower might kill a goblin in two shots instead of three, preventing thousands of points of chip damage over a match.

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