Yes, you can. Scapegoat is a Quickplay Spell card, so its activation can be chained to another Quickplay Spell card, such as Mystical Space Typhoon.
as of 2011, mystical space typhoon has been switched to semi-limited.(Link to Limited and Forbidden Lists: http:/www.yugioh-card.com/en/limited/#limited_trd)
Cards resolve in the opposite order that they are activated in. So, your Mystical Space Typhoon will be chain link 1, and their Trap will be chain link 2. That means their trap will resolve first, and MST will resolve afterwards.
The targeted card is free to be activated in chain to MST as long as it's spell speed 2, or 3.
Yes, "Mystical Space Typhoon" can not negate "Sakuresu Armor" and the rest of the cards mentioned. That is because there is a difference between negating and destroying. "Destroy" means to destroy a card and send it to the Graveyard. "Negate" means to prevent the card's effect from resolving. This is the best way to explain it: Since (most) Normal and Quick Spells, and Normal and Counter Traps don't have continuous effects, their effects still resolve. If a card's effect is considered continuous or requires it to stay on the field (such as Continuous, Equip and Field Spells, and Continuous Traps), when destroyed it's effect can no longer be active.
If the controller of Reinforcements has a monster face-up on the field, you can chain Reinforcements to Mystical Space Typhoon, because both Reinforcements and Mystical Space Typhoon are Spell Speed 2.
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Yes, you can. Scapegoat is a Quickplay Spell card, so its activation can be chained to another Quickplay Spell card, such as Mystical Space Typhoon.
Mystical Space Typhoon will still resolve fully, but Scapegoat will have resolved first, before it did so. Mystical Space Typhoon is not a negation card, all it does is destroy a target, and in this situation, it did just that. It would not be accurate to say Mystical Space Typhoon has 'no effect' here because it did still resolve fully. If any card looked for spell card resolutions, or card destruction, the above scenario would trigger them. However apart from that, the Mystical Space Typhoon is doing nothing more than destroying a card that was about to go to the graveyard already.
If you or your opponent activates Heavy Storm and you chain by activating Mystical Space Typhoon and target the activated Heavy Storm, the chain resolves backwards. The effect of Mystical Space Typhoon destroys Heavy Stormas it is placed on the field when activated. However, the destruction of Heavy Storm does not negate its effect and, as it is Chain Link 1, its effect resolves last destroying all Spell and Trap cards on the field including the activated Mystical Space Typhoon.
Yes, Quickplay Spells such as Mystical Space Typhoon can be chained from hand, on your own turn only. If you want to activate them in the opponent's turn, they must have been Set on a previous turn.
Yes. Mystical Space Typhoon destroys its target. Destroy is a specific kind of send, so will satisfy Hysteric Sign's activation condition.
Yes, but why? Mysical Space Typhoon only destroys cards, it doesn't negate them. Chaining MST to Card Destruction will not stop it from resolving as normal.
Mystical Space Typhoon does not actually "negate" a Spell or Trap Card. You can chain any Spell or Trap Card activation with Mystical Space Typhoon, destroying it. The destruction of the card does not negate its effects.However, depending on the type of Spell or Trap card, it can prevent its effect from taking place. Continuous, Equip, and Field Spell Cards are the only Spell cards that will have their effects stopped if they are chained with Mystical Space Typhoon. The same rulings apply to Continuous Trap Cards. As long as you chain to the activation of the Spell or Trap Card with Mystical Space Typhoon and target it, when the chain resolves the Spell or Trap Card's effect will disappear.For example, if your opponent activates the Equip Spell Card Premature Burial and you chain with Mystical Space Typhoon, when the Chain resolves, Premature Burial will be destroyed and the effect will not resolve.Normal and Quick-Play Spells, and Normal Traps will carry out their effects regardless if they are destroyed. If you chain your opponent's Mirror Force or Monster Reborn activation, when the chain resolves, the card will be destroyed, but the effect will still resolve.These rulings apply to any other cards that have similar effects to Mystical Space Typhoon, such as Dust Tornado and Twister.
It cannot negate the activation of a trap card. It is basically the opposite of Magic Jammer. Mystical Space Typhoon can destroy face down spells and traps, continuous spells and traps, and field and equip spell cards.
You will resolve the chain in reverse order. Scapegoat will summon the four 'Sheep Tokens' but its card will remain on the field for a moment. Resolved cards on the chain only go to the graveyard after the whole chain has resolved, or, when something destroys them. Mystical Space Typhoon's effect will resolve next, destroying the Scapegoat card and sending it to the graveyard. Lastly Mystical Space Typhoon's card will go to the graveyard.
as of 2011, mystical space typhoon has been switched to semi-limited.(Link to Limited and Forbidden Lists: http:/www.yugioh-card.com/en/limited/#limited_trd)