An Explosive Situation! The One Who Holds the Key!

Valgaav refuses Xellos' offer, and Lina and the gang show up (along with Almayce.) They get into a little fight with Valgaav, and Gourry again loses his sword, but to Valgaav this time.
Valgaav reveals to open the gate, you only need two weapons, and hurries to the gate way. Almayce tells everyone without the rest of the weapons, Valgaav will lose control on opening the gate way. He transport them to gate way also, where Valgaav is just about to open it.

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S03E14 - Striding and Swaggering! Lamentation Without End!