Detect Authority

I control an untapped Anarch with fortitude who is being rushed by a Tupdog. I play Detect Authority, the rush ends because the Tupdog cannot pay 2 blood. Does the Tupdog untap and get another action? Is the Tupdog tapped but can play As the Crow because he rushed successfully? Or does the action end in failure leaving the Tupdog tapped and useless?

Detect Authority
Type: Reaction
Requires: anarch Animalism/Serpentis/Thaumaturgy
Requires an anarch.
[ani] Only usable during a action directed at a minion or location you control. The action ends (no cost is paid), unless the acting minion burns 2 blood immediately.
[ser] +1 intercept.
[tha] Reduce a bleed against you by 2.

As the Crow
Type: Action Modifier
Requires: Flight
[FLIGHT] Only usable after a successful action. Untap this minion. A minion can play only one As the Crow each turn.

Thanks,
RY

Detect Authority ends the action immediately, similar to obedience, which means no action modifiers can be played anymore, and since it doesn't say it untaps the action minion, the acting minion stays tapped. And no the action isn't considered succesful either.

Robba wrote:

I control an untapped Anarch with fortitude who is being rushed by a Tupdog. I play Detect Authority,

You can not play Detect Authority at the fortitude level because their isn't one. If you played it at the ani level, the action would end(unsuccessfully).

Detect Authority
Type: Reaction
Requires: anarch Animalism/Serpentis/Thaumaturgy
Requires an anarch.
[ani] Only usable during a action directed at a minion or location you control. The action ends (no cost is paid), unless the acting minion burns 2 blood immediately.
[ser] +1 intercept.
[tha] Reduce a bleed against you by 2.

Yep, they can't freak drive, As the Crow, etc.
Another cool thing about the card is that it specifies blood, not "blood or life". So if a War Ghoul or Shambling Horde rushes one of your guys, you play Detect Authority and its Instant Failure. Quite a cool card. I put a couple of them in an effective Tzim anarch wall deck I used, for when people went for my PB:Montreal etc.