S1, E4: Avan turns into a dragon and attacks Dai, who fights back to no avail; to defeat Avan's flames requires Wave Slash; as Dai clears his objective, someone enters the island; who should appear before Avan but the worst possible being.

S1, E4: Avan turns into a dragon and attacks Dai, who fights back to no avail; to defeat Avan's flames requires Wave Slash; as Dai clears his objective, someone enters the island; who should appear before Avan but the worst possible being.