Lumis and Umbra are two Rare Hunters who work for Marik Ishtar in Yu-Gi-Oh!

The Anime

Lumis & Umbra's debut
Lumis is a short bald man, and Umbra is tall with spiky green hair. They dueled Yugi and Kaiba in Battle City, but were easily defeated when Kaiba summoned Obelisk the Tormentor. They later challenged them to a rematch, with decks specifically designed to take out the Egyptian God Cards. This time, they wore robes, and Lumis wore half a light mask, and Umbra wore half a dark mask. They dueled Yugi and Kaiba in a duel in which, when a player's life points reached zero, the shadow box would shatter the glass on the roof, which is a divider between their world and the Shadow Realm, and would cause them to fall into the Shadow Realm.

The duel took four episodes, but in the end, Kaiba summoned Obelisk the Tormentor and attacked Umbra's life points directly, defeating him and sending him falling into the Shadow Realm. He used a parachute to catch onto a pole (as in the Japanese version, there was no shadow barrier, they would simply fall to their deaths). ;Yugi gave Lumis the chance to surrender, when Marik took over his body and trapped his soul in the Shadow Realm.