S4·E139 Furious Roar

The corpse of Bel and Fran are revealed to be illusions of Fran, who wanted to see whether Sil or Xanxus is stronger. Olgelt sends his Rain Elephant after Xanxus but they become petrified in mid-flight. Xanxus' Sky Lion box weapon, Besta, is revealed to be the one petrifying the Elephant. Sil attacks Xanxus with his storm bats causing heavy damage to him. Xanxus unmoving from his throne becomes enraged and reveals Besta is actually a Sky-Storm Liger, an offspring from a Sky lion with a Storm tiger.