Anathema, zero blood vampire and steal blood strike

Palamedes wrote:

Vampire A has zero blood and "Anathema" attached.
Vampire B enters combat with vampire A.
Vampire B plays "Theft of Vitae" to steal 1 blood.
Vampire A stikes hand strike for 1.

Question: Will this situation trigger Anathema?

Warning: Spoiler!

Anathema
Requires a prince or justicar.
Choose a ready vampire. Successful referendum means this card is put on the chosen vampire. If the attached vampire's blood is reduced to 0 in combat, the attached vampire is burned and the Methuselah controlling the opposing minion gains pool equal to the attached vampire's capacity.


Theft of Vitae
tha - Ranged strike: steal 1 blood or life (becoming blood).
THA - Ranged strike: steal 2 blood or life (becoming blood).

Anathema:
Burns the target vampire when the target is reduced to zero blood in combat,
regardless of the source of the loss of blood (card text). Still won't
burn a vampire just for entering a combat with zero blood, however - there
must be an actual "reduction" in blood.

Steal Blood: This effect moves blood counters or life counters from the target to the striking minion. This does not count as damage, so the effect cannot be prevented with damage prevention effects. This effect occurs before the mend damage step of damage resolution, so the stolen blood can be used to mend damage even if the damage is inflicted simultaneously. If the stolen blood causes the striking vampire to have more blood than their capacity, the excess drains off immediately.

Name: Mercy for the Weak
[AH:C2]
Cardtype: Combat
Cost: 2 blood
Strike: combat ends. Only usable if this vampire has more blood than the opposing vampire. Opposing vampire gains 1 blood (even at long range).
Artist: Ron Spencer

Name: Telepathic Tracking
[SW:U, LoB:PO2, Third:U, SP:DoF3, NB:PTr2]
Cardtype: Combat
Cost: 1 blood
Discipline: Auspex
[aus] Press, only usable to continue combat. If another round of combat occurs, this vampire gets 1 optional maneuver that round.
[AUS] Only usable if both combatants are still ready and combat would end. Instead, start a new round.
Artist: Mike Danza

Ankha wrote:

The question would make more sense if A is the one stealing blood, and B the one hand-striking (in which case, A would burn).

Palamedes wrote:

Ankha wrote:

The question would make more sense if A is the one stealing blood, and B the one hand-striking (in which case, A would burn).

That's clear, but I'm not sure if I understand correctly this an actual "reduction" in blood.

What if:
Vampire A has zero blood and "Anathema" attached.
Vampire B strikes him with hand strike for 1.

Will this trigger Anathema or Vampire A goes to torpor?

For each point of damage successfully inflicted on a vampire, they must burn 1 blood to mend the damage. A vampire can burn all of their blood if needed, and doing so does not have any other negative effects on the vampire. If a vampire cannot mend all the damage (that is, more damage is successfully inflicted than they have blood with which to mend), they burn blood to mend what damage they can, and the unmended damage leaves them wounded.