Because the in-game currency is always strictly limited, making the wrong upgrade choices can cripple your progression for months.
Many new players make the fatal error of trying to keep every single card in their collection at the same level.
Focusing on a Single Win Condition
The golden rule for free-to-play users is to identify one strong, meta-resistant deck and pour every resource into it.
Once you have chosen your primary deck, do not deviate from it, no matter how tempting a new card release might seem.
Gold is the hardest resource to farm.Focus your requests on your main win condition.Don't use a book on a level one unit.
The Math Behind the Upgrades
Not all upgrades provide the exact same relative value on the battlefield.
If your primary removal spell cannot kill the most popular meta unit, it must be upgraded immediately.
ItemHow to Use ItCoinsSave strictly for upgrading cards in your main deck from level 13 to 14Premium CurrencyNever speed up chest timers or buy gold directly
Slow and Steady Progression
It is incredibly tempting to upgrade that shiny new legendary card, but it will only slow down your overall ladder progress.
A maxed-out free-to-play deck piloted by a highly skilled veteran is the most dangerous force in the game.
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