For Polymerization, the Fusion Components/ Fusion Material Monsters can either be in your hand or on the field, or a combination of both.
No, you cannot use Fusion Substitute Monsters for "Future Fusion". You can, however, use Fusion Substitute Monsters for "Chain Material" as long as those Fusion Substitute Monsters exist on your field or hand. The reason Fusion Substitute Monsters cannot be used from your deck is because they have no substitute ability while in the deck and thus cannot be used as replacements for other Fusion Material Monsters.
Gemini Monsters are normal or special summoned as normal, but when they arrive on the field, they are considered Normal Monsters and have no effects. The next time you are allowed to Normal Summon, you can 'second summon' them, ie, they count as being summoned again, even though they never leave the field. This turns them into effect monsters and switches on their effect. Note that if you are trying to 'second summon' a Lv5 or higher monster, no tribute is needed.
Face-down monsters are indeed monsters for the purposes of cards which count monsters on the field or affect all monsters.However, if a card effect specifies a monster with a specific type, attribute, ATK, etc., it will ignore face-down monsters because those values are unknown in game terms.Note: monsters used as Equip cards are not considered monsters.
Generally, Synchro Summoning sends cards from the field to the Graveyard. There are some cards that allow you to use monsters in your hand as Synchro Material Monsters instead, such as Eccentric Boy.Eccentric BoyAttribute: WINDType: Spellcaster/Tuner/EffectLevel: 3ATK: 800DEF: 200When using this card as a Synchro Material Monster, the other Synchro Material Monsters is 1 monster in your hand. The Synchro Monster that used this card as a Synchro Material Monster cannot activate its effect, its effect(s) is negated, and is removed from play when removed from the field.
No, XYZ material cards are not considered to be on the field. They cease to be considered cards on the field, when they are overlaid, but do not count as 'leaving the field' for the purpose of effects that trigger from that. Also when they are sent to the graveyard for any reason, they do not count as being 'sent from the field' so again, effects that trigger from that, will not activate.
The XYZ material does not count as being 'on the field'. For example, a Sangan used as XYZ material does not trigger if sent to the graveyard because it does not count as being on the field. Likewise, they cannot be seperately be affected by destruction effects. Because of this, they also do not satisfy activation conditions like that of Gladiator Beast War Chariot.
For Polymerization, the Fusion Components/ Fusion Material Monsters can either be in your hand or on the field, or a combination of both.
Yes, face down cards on the field count.
No, you either negate the entire effect with Prime Material Dragon or get rid of all of the monsters on the field. You cannot simply choose which monsters gets to be destroyed. You cannot negate an effect midway during its resolution.
XYZ material monsters no longer count as being monsters on the field, any equip cards will fall off, they will go to the graveyard. Ekibyo Drakmord can only return to hand when it destroys the monster it equips. In this case it will simply go to the graveyard and can't return, it went there as its equip target became an invalid one.
No, you cannot use Fusion Substitute Monsters for "Future Fusion". You can, however, use Fusion Substitute Monsters for "Chain Material" as long as those Fusion Substitute Monsters exist on your field or hand. The reason Fusion Substitute Monsters cannot be used from your deck is because they have no substitute ability while in the deck and thus cannot be used as replacements for other Fusion Material Monsters.
Gemini Monsters are normal or special summoned as normal, but when they arrive on the field, they are considered Normal Monsters and have no effects. The next time you are allowed to Normal Summon, you can 'second summon' them, ie, they count as being summoned again, even though they never leave the field. This turns them into effect monsters and switches on their effect. Note that if you are trying to 'second summon' a Lv5 or higher monster, no tribute is needed.
Face-down monsters are indeed monsters for the purposes of cards which count monsters on the field or affect all monsters.However, if a card effect specifies a monster with a specific type, attribute, ATK, etc., it will ignore face-down monsters because those values are unknown in game terms.Note: monsters used as Equip cards are not considered monsters.
Generally, Synchro Summoning sends cards from the field to the Graveyard. There are some cards that allow you to use monsters in your hand as Synchro Material Monsters instead, such as Eccentric Boy.Eccentric BoyAttribute: WINDType: Spellcaster/Tuner/EffectLevel: 3ATK: 800DEF: 200When using this card as a Synchro Material Monster, the other Synchro Material Monsters is 1 monster in your hand. The Synchro Monster that used this card as a Synchro Material Monster cannot activate its effect, its effect(s) is negated, and is removed from play when removed from the field.
When it comes to using Fusion Monsters as Fusion Material Monsters, they are used no differently than any other monster you would use as a Fusion Material Monster.For example, in order to use Polymerization, the required Fusion Material Monsters must be present in your hand and/or field. Since Fusion Monsters cannot exist in your hand, if you needed to Fusion Summon Dragon Master Knight, you will need to have the Fusion Monster Blue-Eyes Ultimate Dragon on the field and Black Luster Solider in your hand or on the field.It should also be noted that some Fusion Monsters like Dragon Master Knight do not state that "a Fusion Summon of this monster can only be conducted with the above Fusion Material Monsters". So you can use Fusion Substitute Monsters like King of the Swamp in place of the Fusion Monster.
Yes it can. 'Des Croaking' is an effect that will destroy monsters on the field, therefore Prime Material Dragon can chain to and negate it.