If a monster activates an effect, then Fiendish Chain can be chained to this. Fiendish Chain will resolve first, meaning the monster's effect will be negated when it tries to resolve. So if Chaos Sorcerer activates his Ignition Effect, Fiendish Chain can be used to negate it.
The turn player has Priority, so can activate Chaos Sorcerer's effect as chain link 1. Fiendish Chain can be chained to this. Fiendish Chain will resolve first, so Chaos Sorcerer's effect will be negated when it tries to resolve.
No. As soon as you enter the end phase, Fiendish will effect the monster.
no fiendish chain most certainly does not negate attacks, if the card does not state it negates an attack it does not negate attacks
Only if you haven't activated it yet. Scenario 1: player A summons Kerykeion. Player B activates Fiendish Chain. Player A activates Mystical Space Typhoon to destroy Fiendish Chain. Player A is allowed to activate Kerykeion's effect. Scenario 2: Player A summons Kerykeion. Player B allows it. Player A activates Kerykeions effect, removing an Evilswarm monster and and targeting to add a different Evilswarm monster. Player B responds with Fiendish Chain, targeting Kerykeion. Player A then plays Mystical Space Typhoon to destroy Fiendish Chain. Player A is no longer allowed to activate Kerykeion this turn since his effect was already activated this turn.
Yes. Effect Veiler can chain to their activations in the main phase, and Fiendish Chain can chain to them at any time outside the damage step (meaning if they are attacked and flipped, it can't negate them).
The turn player has Priority, so can activate Chaos Sorcerer's effect as chain link 1. Fiendish Chain can be chained to this. Fiendish Chain will resolve first, so Chaos Sorcerer's effect will be negated when it tries to resolve.
No. Because Fiendish Chain targets a monster, Obelisk the Tormentor will not be affected by it.
It doesn't matter who started with Priority, the simple matter is, if a monster has an activated effect, then Fiendish Chain can be chained to it. Fiendish Chain will resolve first, and the monster effect will be negated before it can resolve. The main problem is against monsters that tribute themselves as a cost such as Exiled Force or Stardust Dragon. Because they leave the field as the cost of their own activations, Fiendish Chain would not be able to target them.
Fiendish chain stays targeted to the monster and negates its effect when you enter end phase
No. As soon as you enter the end phase, Fiendish will effect the monster.
Flip Effects are Triggered Effects, so if a player flipped a flip effect monster, the effect will trigger as chain link 1. Fiendish Chain can be chained to it, to negate the effect when it tries to resolve. However, if the monster is flipped by an attack, then the trigger happens during the Damage Step. There are restrictions against what you are allowed to activate during the damage step, and Fiendish Chain can't be used here. So it could not stop a Flip Effect at that time.
When the Monarch is tribute summoned, it has a triggered effect that activates. Fiendish Chain can be chained to this. Fiendish Chain will resolve first, meaning the Monarch effect will be negated when it tries to resolve.
Yes. Fiendish Chain would work on Azure-Eyes Silver Dragon on it's summoning effect. The moment Azure-Eyes is summoned you can chain link Fiendish Chain to Azure-Eyes's effect creating a chain link 2. It would resolve as chain link 2: Fiendish Chain, then chain link 1 Azure-Eyes effect.
no fiendish chain most certainly does not negate attacks, if the card does not state it negates an attack it does not negate attacks
Only if you haven't activated it yet. Scenario 1: player A summons Kerykeion. Player B activates Fiendish Chain. Player A activates Mystical Space Typhoon to destroy Fiendish Chain. Player A is allowed to activate Kerykeion's effect. Scenario 2: Player A summons Kerykeion. Player B allows it. Player A activates Kerykeions effect, removing an Evilswarm monster and and targeting to add a different Evilswarm monster. Player B responds with Fiendish Chain, targeting Kerykeion. Player A then plays Mystical Space Typhoon to destroy Fiendish Chain. Player A is no longer allowed to activate Kerykeion this turn since his effect was already activated this turn.
Machine Gearframe has a triggered effect and an Ignition Effect, and one final effect that counts as the effect of a spell card. If Fiendish Chain is used on it while it is a monster, then the first two effects will be negated when they try to resolve. Machina Gearframe will not be able to turn itself into an Equip Card. However if Machine Gearframe has already become an equip card, then it's now considered a spell card, so Fiendish Chain can't be used on it here. It can therefore summon itself back into the monster zone, this can't be stopped.
Have to remove chain links, there is no chain adjustment