Rulings: Harass vs 2nd Tradition

Question:
What happens when you rush a vamp who subsequently untaps and attempts to block (e.g. with 2nd Tradition)? What if xer becomes an invalid target (e.g. Ambushed minion untaps during the action, Harassed minion increases its blood to more than 3)?

Answer:
The action checks for validity upon successful resolution. If the target untaps and blocks, the action is blocked (unless stealth is added to the action or an effect causes the block to fail) and both minions enter combat as per the rules for blocking.

If the target is invalid (e.g. untapped against a Noose of the Hound played at aus) when the action resolves successfully, the action 'fizzles'.

Reference:
http://groups.google.com/group/rec.games.trading-cards.jyhad/browse_thread/thread/951649faeb97d1d5/5be16d47d5d86e96?q=jyhad+harass+untap+author:lsj#5be16d47d5d86e96


Card Text:

Harass
Cardtype: Action
(D) Enter combat with a vampire who has 3 or fewer blood or with any tapped minion. This acting minion gets an optional press, only usable to continue, in that combat.

Ambush
Cardtype: Action
(D) Enter combat with a ready tapped minion controlled by another Methuselah. The acting minion gets an optional maneuver during this combat.

Nose of the Hound
Cardtype: Action
Discipline: Spiritus/Auspex
+1 stealth action.
[aus] (D) Enter combat with a ready tapped minion controlled by another Methuselah. This acting minion gets an optional maneuver in that combat.
[spi] As [aus] above, with an additional optional maneuver during that combat.
[SPI] As [spi] above, but enter combat with any ready minion controlled by another Methuselah.

Second Tradition: Domain
Second Tradition: Domain, The
Cardtype: Reaction
Requires a ready prince or justicar.
+2 intercept. Also usable by a tapped prince or justicar, even if intercept is not yet needed, to burn a blood to untap and attempt to block with +2 intercept.