Begone, Knave!: If "Gemini Elf" attacks a Defense Position "Battle Footballer", and "Gemini Elf"s controller takes 200 damage, then "Begone, Knave!"s effect will send "Battle Footballer" back to its owner's hand.

Cyber Blader: Example 1: The opponent controls "Gemini Elf" and "Dark Magician". The opponent attacks with their "Dark Magician", attacking "Cyber Blader", whose ATK is currently doubled. The opponent activates "Mystik Wok" and Tributes their "Gemini Elf" to gain 1900 Life Points. "Cyber Blader" now has 2100 ATK points, so it does not destroy "Dark Magician", but since the opponent has only 1 monster now, "Cyber Blader" is not destroyed as a result of battle, either.

Dummy Golem: If the opponent has "Blindly Loyal Goblin" and "Gemini Elf" on the field, and you activate the Flip Effect of "Dummy Golem", the opponent cannot select "Blindly Loyal Goblin". They must select "Gemini Elf".

Gemini monster: Also note that when a card’s effect refers to Gemini monsters (without quotes), it does NOT mean cards with “Gemini” in the card name, such as “Gemini Elf”

Harpie Lady 3: If you control "Harpie Lady 3" and "Gemini Elf" and your opponent activates "Change of Heart" to gain control of "Gemini Elf", then attacks your "Harpie Lady 3", your "Gemini Elf" cannot attack for 2 of your opponent's turns, even after it returns to your side of the field.

Magical Dimension: You cannot Tribute a monster for "Magical Dimension" that is "unaffected by Spell Cards" since Tributing is part of the effect of "Magical Dimension" (not a cost). If the only monster on your side of the field is "Gemini Elf" while "Non-Spellcasting Area" is active, then you could not activate "Magical Dimension".

Pole Position: I have "Pole Position", "Luminous Spark" (+500 to LIGHT), and "Gemini Elf" (1900 ATK / EARTH) face-up on the field. "Gemini Elf" is the monster on the field with the highest ATK, so it is unaffected by Spell Cards. If the opponent Summons "X-Head Cannon" (1800 ATK / LIGHT), "Luminous Spark" will raise the ATK of "X-Head Cannon" to 2300, making it the highest ATK monster on the field, so it's unaffected by Spell Cards, so it drops to 1800 ATK, then increases to 2300, then drops to 1800, etc. This would create an infinite loop. Therefore, the opponent cannot Summon "X-Head Cannon".

Pole Position: The opponent has "Blue-Eyes White Dragon" (3000 ATK) and "Pole Position" face-up on the field. I have "Gemini Elf" (1900 ATK), and an "Opticlops" (1800 ATK) equipped with "Axe of Despair"(+1000 ATK; 2800 total) face-up on the field, and a Set "Ring of Destruction". If I activate "Ring of Destruction" to destroy "Blue-Eyes White Dragon", then "Opticlops" will be the highest ATK monster on the field, and cause an infinite loop (it is the highest, it isn't, it is, it isn't, etc.). Therefore, I cannot target "Blue-Eyes White Dragon" with "Ring of Destruction".

Pole Position: The opponent has a face-down "Pole Position". I have "Opticlops" (1800 ATK) and "Gemini Elf" (1900 ATK) face-up on the field. I activate "Axe of Despair" (+1000 ATK) and try to equip my "Opticlops" (1800 ATK). The opponent cannot chain "Pole Position", since that would cause an infinite loop. "Pole Position" is an illegal activation. Put it back face-down.

Pole Position: I have "Pole Position", "Banner of Courage", and "Opticlops" face-up on the field. The opponent has "Gemini Elf" face-up on the field. When I enter my Battle Phase, an infinite loop is created as "Opticlops" fluctuates between 1800 and 2000 ATK. So "Pole Position" is destroyed.

Pole Position: I have "Pole Position", "Gemini Elf" (1900 ATK / EARTH) and "Mystic Plasma Zone" (+500 ATK to DARK) face-up on the field, and an "Opticlops" (1800 ATK / DARK) in face-down Defense Position. The opponent attacks my face-down "Opticlops" with "Mokey Mokey". When we flip "Opticlops" face-up in the Damage Step, an infinite loop is created as "Opticlops" fluctuates between 1800 and 2300 ATK (either above or below "Gemini Elf", making it the strongest monster on the field, or not). Therefore, "Pole Position" is destroyed.

Soul-Absorbing Bone Tower: If you have a "Soul-Absorbing Bone Tower" equipped with "Raregold Armor" and a Zombie-Type monster, your opponent cannot attack. Even if you have a Zombie-Type monster, "Gemini Elf", and a "Soul-Absorbing Bone Tower" equipped with "Raregold Armor", your opponent cannot attack.

Susa Soldier: When this card inflicts Battle Damage to the opponent it is halved, regardless if it was a direct attack, or from an attack against another monster. For example, if your "Susa Soldier" (ATK 2000) attacks the opponent's "Gemini Elf" (ATK 1900), the opponent will take 50 points of Battle Damage. The damage points are rounded up when there is a fraction.