The Immortals are an Archetype of known chracters of greek and roman mythology. This cards have an incredible ATK & DEF points and can be even stronger with the Field Spell Card that is added from your Deck to your Hand when The Immortal is summoned.
The Immortals were released in Duels of Destiny: Immortal's War
APDS3-001: Ares The Immortal
APDS3-002: Hefesto The Immortal
APDS3-003: Kukusho The Immortal
APDS3-004: Poseidon The Immortal
APDS3-005: RX The Immortal
APDS4-001: Zeus The Immortal