Slayers S03 E11 The Hurdle's Cleared? Jiras' Hidden Power!

Lina and the gang get tricked by Jillas who tellsl them a great power is on top of this funny looking mountain. They get paired by couples, Lina/Zelgadis, Gourry/Amelia, and Filia/Xellos which Filia ultimately refuses. This pairing also upsets Amelia. After some minor fights and tricks by Jillas, Gourry's recklessness causes the mountain to tip over losing his Sword of Light to Jillas.