Sur Gamefaqs j´ai trouvé ca :
DESERT 1-9
1. Stage clear
2. Clear with a deck that has no 4-square-sized BATTLE characters
3. Clear with a deck that has no 5-square-sized BATTLE characters
4. Clear with a deck of at least 12.
5. Clear with at least 10 HELP COMMAND characters in your deck.
C´est un deck sans Koma 4 cases, pas 4 ou +