- 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 the strength of "L&D" each time they take any form of point damage.
- This card can be searched by "Witch of the Black Forest".