Qustion :
Mon pred a un vampire malade avec 0 blood. Il chasse, mais gagne rien.
Puis je jouer Tainted Vitae sur lui 
Si oui :
gagne t il 0 blood gagne t il 0+2 = 2 blood.Tainted Vitae [AH:U5]
Cardtype: Reaction
Clan: Follower of Set
Cost: 2 blood
Only usable when a vampire controlled by your predator successfully hunts.
That vampire gains 2 additional blood (ignore excess blood). For the remainder of the game, that vampire must burn an additional blood when he or she attempts to bleed you.
Vampiric Disease [Jyhad:R, VTES:R]
Cardtype: Master
Master.
Choose a controlled vampire; put a disease counter on him or her if he or she does not have one. Each time a vampire with a disease counter is in combat at close range with another vampire, the second vampire gets a counter as well. An afflicted vampire cannot gain blood by hunting. When an afflicted vampire untaps, he or she burns a blood, or, if unable, loses all disease counters.
