No, unless specifically stated otherwise on the card, a monster's special summon requires it to be summoned from your hand, or in the case of Synchro and XYZ monsters, from the Extra Deck.
Plaguespreader Zombie can special summon itself from the graveyard because it says it can. But you cannot use for example, the special summon requirements on Chaos Sorcerer, or an XYZ monster, while they are in the graveyard.
No, because it wasn't 'properly' special summoned. To be able to special summon a Ritual Monster from the graveyard, it has to be initially summoned by Ritual Summon. Ritual Foregone does not Ritual Summon.
No, Raviel is what is known informally as a 'nomi' monster, meaning there is 'only' one way to summon him, and that's to follow the instructions in his text. This kind of monster can be identified by the text "Cannot be special summoned except by", and these monsters can't be summoned by Monster Reborn, even if you properly summon them, and they are then destroyed.
Obviously. Fulfillment of the Contract's effect is that you pay 800 lp and special summon a ritual monster from your graveyard, and when the equip card is destroyed, the ritual monsters destroyed. As usual with monsters who can't be Normal Summoned, the Ritual Monster must have properly been summoned first before you use Fulfillment of the Contract. You cannot simply discard a Ritual Monster and summon it with that card.
Unless they are monsters that are special summon only, level 7+ monsters require 2 tributes.
Yes, you will Special Summon the Fusion Material monsters for the Fusion Monster; as long as the following conditions are met:The Fusion Monster you are targeting was Fusion SummonedAll the monsters used to Fusion Summon must be your GraveyardFor example, if you use De-Fusion on your Blue-Eyes Ultimate Dragon (BEUD), it will be returned to your Extra Deck. Then, if that BEUD was Fusion Summoned and all the monsters used to Fusion Summon it are in your Graveyard, you can Special Summon all of them to your side of the field. This includes Substitute Fusion Material monsters if they were used.If the Fusion Monster was not Fusion Summoned, it will still be returned to the Extra Deck, but no additional monsters will be Special Summoned.These same rules apply to your opponent's Fusion Monster you target with De-Fusion. However, if your opponent is in control of your Fusion Monster when you target it, the Fusion Monster will be returned to your Extra Deck and the Fusion Material monsters will be Special Summoned to your side of the field.
A special summon is any summon that doesn't count as a normal summon, so you can special summon as many monsters as you wish per turn. But someone can't just special summon a monster by themselves. In order to special summon a monster, there must be a card that lets you do so. For example, the card Call of the Haunted lets you special summon a monster from your graveyard. Or, a monster that lets you special summon it in some way is a special summon. Most monsters that let you special summon it have you need to have destroy or remove from play cards. For example, a monster that needs you to remove from play cards is Dark Necrofear. Dark Necrofear can only be special summoned by removing three Fiend-type monsters from your graveyard. Or, there are monsters that can be special summoned when a condition is met. For example, Tragoedia can be special summoned when you take damage. Or, there are monsters that let you special summon monsters from your deck. An example is UFO Turtle. UFO Turtle can special summon any FIRE-attribute monster from your deck with 1500 ATK or less when it is destroyed by battle. Also, Fusion Summoning, Ritual Summoning, and Synchro Summoning all count as Special Summoning.
You can only special summon it initially from hand, by removing a Light and a Dark monster from your graveyard (now known as Banishing). If you do this, and it is later destroyed, then you cannot summon it from the graveyard with the same method, as it only works in hand. But as a 'special summon only' monster, you can bring it back with cards like Monster Reborn. (unlike 'cannot be special summoned except by' monsters, who cannot).
No, because it wasn't 'properly' special summoned. To be able to special summon a Ritual Monster from the graveyard, it has to be initially summoned by Ritual Summon. Ritual Foregone does not Ritual Summon.
If you properly Special Summoned him first, and he is then destroyed, you can special summon him back from the graveyard with cards like Monster Reborn. You do not need to remove another Light and Dark monster to do this, and just as important, you cannot remove a Light and Dark monster to special summon him from the graveyard, he can only be summoned from hand by doing that.
No. Vanguard of the Dragon's card lore clearly states that it can only Special Summon a "...Dragon-Type Normal Monster from either player's Graveyard."
No, Raviel is what is known informally as a 'nomi' monster, meaning there is 'only' one way to summon him, and that's to follow the instructions in his text. This kind of monster can be identified by the text "Cannot be special summoned except by", and these monsters can't be summoned by Monster Reborn, even if you properly summon them, and they are then destroyed.
You are allowed to use Monster Reborn and similar cards, under most circumstances. The important thing is that the Synchro Monster must have been properly special summoned first. If the Synchro Monster ever goes to the graveyard without being properly summoned by Synchro Summon (ie, Starlight Road can do this) then the Synchro Monster cannot be revived like that. Similarly, if a Synchro Monster had its summon negated, it also can't be brought back from the graveyard. Last thing to consider is some might say "cannot be special summoned except by Synchro Summon" meaning the only way to summon it is by Synchro Summon, there is no other way, even if it was properly summoned first.
Obviously. Fulfillment of the Contract's effect is that you pay 800 lp and special summon a ritual monster from your graveyard, and when the equip card is destroyed, the ritual monsters destroyed. As usual with monsters who can't be Normal Summoned, the Ritual Monster must have properly been summoned first before you use Fulfillment of the Contract. You cannot simply discard a Ritual Monster and summon it with that card.
Special Summoning from the Graveyard requires an effect that specifically allows you to do so. Call of the Haunted, as an example, allows a player to select and Special Summon one monster from their respective Graveyard in face-up Attack Position.
Ritual monsters may only be special summoned from the graveyard if they were successfully summoned by Ritual Summon. If they were sent there in any other way - like simply discarded from hand, or improperly summoned by Ritual Foregone (it special summons but does not Ritual Summon), then you cannot revive them from the graveyard with cards like Monster Reborn or Fulfillment of the Contract.
No, only from your hand. They can be special summoned from graveyard by cards like Monster Reborn if they were properly summoned initially before they went there. However you can't resummon them from the graveyard with their Ritual Spell Card.
Generally, the only way to Synchro Summon is by sending monsters from the field to the Graveyard. There may be some cards that allow you to Synchro Summon with cards from the hand, such as Eccentric Boy, or Special Summon a Synchro Monster with cards from the Graveyard, such as Blackwing - Vayu the Emblem of Honor.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.Blackwing - Vayu the Emblem of HonorAttribute: DARKType: Winged Beast/Tuner/EffectLevel: 1ATK: 800DEF: 0If this card is face-up on the field, you cannot use it for a Synchro Summon. If this card is in your Graveyard, you can remove from play this card plus 1 non-Tuner "Blackwing" monster in your Graveyard, and Special Summon 1 "Blackwing" Synchro Monster from your Extra Deck whose Level equals the total Levels of the removed monsters. The effect(s) of that Synchro Monster is negated.Note that this is treated as a SPECIAL SUMMON, not a Synchro Summon.