A Gemini monster is a special kind of Effect monster that is treated as a Normal Monster with no effects when initially summoned to the field. At any time after this that you can perform another Normal Summon, you can choose to 'summon it again' (in the OCG, this is called a 'second summon') and it then becomes an
effect monster with the listed effects.
So, Player A, in his main phase, Normal Summons Blazewing Butterfly. It is a Normal Monster, with no effects. In his next turn, he can use his turn's Normal Summon to 'Gemini Summon' the Blazewing Butterfly, which will turn it into an effect monster with the effects on the card. Anything that grants additional Normal Summons can speed this process up.
The card doesn't leave the field at any point, you are performing the summon on a card that is already on the field, and it does not require tribute in the case of a high level Gemini monster. But since it's considered a Normal Summon, it can be negated, and summon-responsive cards like Torrential Tribute can be used against it. Because it never leaves the field, any cards equipped to it, will remain equipped, any bonuses, conditions and counters will be retained also.
Assuming the defending monster is also in attack position, both monsters will be destroyed.
Five-Headed Dragon.
Unless the monster specifically says otherwise, it takes two tributes for a monster of Lv7+
yes its name is dark blade
Your monster is destroyed if the monster you attack is in attack position, and you lose life points.
Please be more specific; based on your question, though, yes, the effects of Gemini monsters can be used on other Gemini monsters.
You do.
The answer to this question can vary. Unless the card that Special Summoned the Gemini Monster specifically says otherwise, the Gemini Monster will be treated as a Normal Monster. If you have not already Normal Summoned this turn, you can perform said action on the Special Summoned Gemini Monster. There may be cards such as Black Brutdrago that states "The Special Summoned monster is treated as an Effect Monster, and gains its effect." In this case, as it states, the Special Summoned monster gains its effect while it is on the field and you do not have to resummon it.
monster reborn
Assuming the defending monster is also in attack position, both monsters will be destroyed.
No, they would become effectless Effect Monsters. That's because Gemini Monsters are Effect Monsters who have a continuous effect that makes them be counted as a Normal Monster while on the field. If Skill Drain is active, this effect is negated, and the Gemini Monster reverts to being an effect monster. However it does not gain its effect monster abilities, these are only switched on by a 'second summon' of the Gemini Monster.
magic trap and monster
Five-Headed Dragon.
Unless the monster specifically says otherwise, it takes two tributes for a monster of Lv7+
Yes because Gemini monsters are treated as normal monsters while on the field or in the graveyard
yes its name is dark blade
Your monster is destroyed if the monster you attack is in attack position, and you lose life points.