The Dreamstone (1990)

S2E3 Urpgor's island

During a trial run of a Viking-inspired warship intended for battling the Noops, Urpgor stumbles upon an island that suddenly emerges from the sea. He seizes the opportunity to use this island as a strategic launch point for his assaults, but soon becomes consumed by the treasures hidden within. Convinced he has discovered an unbeatable stronghold, Urpgor feels invincible—believing that neither Rufus, the Noops, nor especially Zordrack, can reach him now.