Double Crush (ダブルクラッシュ Daburu Kurasshu) is a keyword ability that primarily appears on red cards. Whenever a LRIG or SIGNI with Double Crush deals damage with an attack, it crushes two of the opponent's Life Cloth instead of one.
If a LRIG or SIGNI with Double Crush attacks a player with only one Life Cloth left, that one Life Cloth will be crushed, but the defending player will not lose the game. The player must be dealt damage one more time before they lose the game.
Double Crush does not stack with itself; even if a LRIG or SIGNI gains multiple instances of Double Crush, it will still only crush two Life Cloth. Lancer does not stack with Double Crush (as Lancer both does not deals damage and crushes Life Cloth with an effect rather than through the attack), so if a SIGNI with both Lancer and Double Crush vanishes a SIGNI through battle, only one Life Cloth is crushed. However, Double Crush works with Assassin, as Assassin allows the attack to deal damage.
A LRIG attack with Double Crush can be Guarded against like any other LRIG attack, without any extra concerns.
The two Life Cloth crushed by Double Crush are crushed simultaneously. In the event that two cards with Life Burst are revealed by Double Crush, the defending player may choose the order in which those Life Burst effects resolve.