Clan War deck builder
Clan Wars ask for four decks at once, and no card may appear in more than one of them. Enter your player tag and get a full lineup built only from cards you have maxed.
The rule that catches people out
A card is blocked by identity, not by form. If your first deck runs Wizard as an evolution, the hero version of Wizard is unavailable for the other three decks — they are the same card. The same goes for every card that exists in more than one form.
What you need
Four decks means 32 different cards. That is the hard floor: with fewer than 32 maxed cards no complete lineup exists, no matter how they are combined. The tool tells you how many you are short rather than quietly returning three decks.
Lock and shuffle
The first lineup is rarely the one you want. Lock the decks you like and shuffle the rest — locked decks keep their cards reserved, and the remaining slots are rebuilt around them. Every lineup is assembled from decks ranked players actually run, not from random legal combinations.
Why not just pick four good decks?
Because the best four decks almost always overlap. Log, Skeletons and Fireball show up in half the meta, and once one deck claims them the others have to work without. Choosing a lineup is a different problem from choosing a deck, which is why picking your four favourites by hand usually fails on the third one.