Kuyen - Piper/Pack Alpha, triggers cost ability?

Cardtype: Vampire
Clan: Gangrel
Group: 6
Capacity: 6
Discipline: ANI PRO
Anarch Baron of Santiago: Animals (allies and retainers) cost Kuyén 1 fewer blood or pool.

Cardtype: Master
Master. Requires a ready anarch.
A ready unlocked anarch you control employs or recruits a retainer or ally from your hand (requirements and cost apply as normal). This is not an action and cannot be blocked. Lock that anarch.

Cardtype: Combat
Discipline: Animalism
A vampire may play only one Pack Alpha each round.
This vampire employs an animal retainer from your hand before range is determined. Pay cost as normal.
Burn an animal retainer employed by this vampire and put this card on this vampire. The minion with this card gets +1 strength. A minion may have only one Pack Alpha.

Cardtype: Vampire
Clan: Gangrel antitribu
Group: 3
Capacity: 8
Discipline: cel pre pro DOM OBF
Sabbat: Allies and retainers cost Sébasti{e}n 1 less blood or pool{}. Once each action, he can burn 1 blood to get +1 bleed.