Flashback

[Maxpayne03]

If my {Snapcaster Mage} targets {Daze} in my graveyard, can I return an island to pay for the flashback cost?  Similarly, can I pay the alternate cost if the snap caster mage's target is {Submerge}?

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taken from gatherer rulings on {snapcaster
mage};
10/1/2012   You can't pay other alternative costs of a card you're casting from your graveyard using flashback. For example, if the instant or sorcery has an overload cost, you can't pay that cost.

[Sparkle Ninja]

An example of a flashback card where the flashback is an alternate cost would be {Cabal Therapy}

[Prplprince]

You also can't use kickers for flash back spells I I'm not mistake

[Remillo]

You also can't use kickers for flash back spells I I'm not mistake

Additional costs like Kicker, Multikicker and Strive can be paid when casting for an alternative cost.

Alternative costs, like Overload, can't be used when casting a spell or Flashback or 'without paying its mana cost'.

[Maxpayne03]

If I cast {Snapcaster Mage} at my opponent's end of turn, can the Mage target a sorcery and use it as an instant?

[rarehuntertay]

If I cast {Snapcaster Mage} at my opponent's end of turn, can the Mage target a sorcery and use it as an instant?

No. You still have to follow all timing restrictions.

[Rass]

If I cast {Snapcaster Mage} at my opponent's end of turn, can the Mage target a sorcery and use it as an instant?

No. You still have to follow all timing restrictions.

Wow I didn't know that. Thanks for asking and answering. Any chance you have a link to the rule for that.

[Remillo]

If I cast {Snapcaster Mage} at my opponent's end of turn, can the Mage target a sorcery and use it as an instant?

No. You still have to follow all timing restrictions.

Wow I didn't know that. Thanks for asking and answering. Any chance you have a link to the rule for that.

It's not really a ruling so much as just how casting works.

702.33a: Flashback appears on some instants and sorceries. It represents two static abilities: one that functions while the card is in a player's graveyard and another that functions while the card is on the stack. "Flashback [cost]" means "You may cast this card from your graveyard by paying [cost] rather than paying its mana cost" and "If the flashback cost was paid, exile this card instead of putting it anywhere else any time it would leave the stack." Casting a spell using its flashback ability follows the rules for paying alternative costs in rules 601.2b and 601.2e-g.

Notice that in there, it says absolutely nothing about casting things at instant speed.  Whenever anything says that you may cast something 'until end of turn' or 'this turn' ({Prophetic Flamespeaker}, {Chandra, Pyromaster}, Or snappy, which grants Flashback until end of turn), you always follow normal timing restrictions.  Any effect that lets you cast it right then ({Memory Plunder}, etc.) bypasses timing restrictions because the effect instructs you to cast it right then.

The take-away here is that Flashback is an alternative casting cost, not an activated ability.
Sorry if this is a little incoherent.  I just woke up.

[Maxpayne03]

For snappy flashback cards like {Surgical Extraction}, {Gitaxian Probe}, I suppose I can pay life instead of mana?

[FustyDavorite]

For snappy flashback cards like {Surgical Extraction}, {Gitaxian Probe}, I suppose I can pay life instead of mana?

yes. He states that it's flashback cost is equal to its mana cost. So if its mana cost has phyrexian mana in it, you may pay the life for it.

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for cards with phyrexian mana in cost like {gitaxian probe}, {snapcaster mage} doesnt change the cmc, so you can still pay the phyrexian mana with life.