Complete & improve your deck
Complete a partial deck or improve a full one with a single swap.
How it works
Keep your core, then fill gaps or try one swap
- Add one to seven cards to complete a deck, or all eight to improve it.
- With eight cards, lock the ones to keep and leave one unlocked.
- Run the tool, then use the suggestion or edit your cards.
Your deck
Average elixir
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—Actions
Frequently asked questions
What is the difference between completing and improving a deck?
With one to seven cards, the tool fills the empty slots while keeping every selected card. With eight cards, it searches for one swap among unlocked cards. Lock your core cards to preserve your strategy; locking all eight prevents a swap.
Why does it tell me to keep my current deck?
No eligible single-card swap improved the tool’s score with the current locks and available data. This does not mean your deck is unbeatable. Unlock another card or edit your selection to explore a different direction. If statistics cannot be loaded, try again.
How do I use the score and deck check effectively?
The score weighs card-pair synergy and deck balance, including a win condition, spells, air defense and elixir cost. It is not a predicted win rate. Check how many pairs have synergy data and whether the suggested cards suit your levels and play style. The search can suggest cards outside your collection. Test a change before committing to upgrades.
How do I search, replace or import cards?
Search using a localized or English card name. Select a deck slot, then choose a card to fill or replace it; use Remove to clear the selected slot. To import a complete deck, copy its Clash Royale deck link and use Actions → Paste deck. If clipboard access is unavailable, focus the deck and paste with your keyboard, or select cards manually.
How do evolutions, heroes and exported decks work?
Choose the exact form you want. The builder allows up to two evolution cards and two heroes/champions, with only one form of each base card. A different form replaces the existing version. If no compatible slot is available, remove a special card first. Complete decks can be copied or opened in Clash Royale through Actions; exported links use base card IDs, so check your special forms in the game.