Several of the kingdom’s strongest fighters are locked in battle with Hyoga and Tsukasa. Meanwhile, Senku, Gen and Chrome make it to the miracle cave. They’ll have very little time to put together a weapon to end the war.
It's the leftovers from the bluff tank cannon.
.إنّه ما بقي من مدفع الدبابة المزيّف
Die Überbleibsel
des Bluff-Schussesdes Panzers!
C’est les restes
de notre coup de bluff !
È quello che resta della bomba finta 
che abbiamo usato col carro armato!
É o que sobrou do nosso 
blefe do canhão do tanque!
Я добыл то, что ещё осталось в танке!