- This card can also be searched by "Dogu", "Single Purchase", "Soul Rope", "Resonator Engine", "Vampire Dragon", "Summoner Monk", "Dragunity Corsesca", "Photon Veil" and "Chaos Zone".
- Pay attention to monsters able to inflict Piercing Damage (e.g. "Strong Wind Dragon", "Dark Driceratops", etc), because "Gellenduo" will be destroyed after the Damage calculation due to its own effect.
- "Spirit Barrier" and "The Sanctuary in the Sky" will prevent this card from being destroyed by its own effect.
- This card can be used as a surprisingly useful counter to "Light and Darkness Dragon". As it's immunity to destruction by battle is an active effect, "L&D Dragon" does not negate it. However, this cards secondary effect regarding it's destruction after life point damage IS an effect that is negated, allowing the player to chip away at L&D's strength each time they take any form of point damage.
- This card can be searched by "Witch of the Black Forest".