Encantamento
Quando Alquimia Arterial entrar no campo de batalha, crie uma ficha de Sangue para cada oponente que você tenha. (Ela é um artefato com "

,

, descarte um card, sacrifique este artefato: Compre um card".)
As fichas de Sangue que você controla são Equipamentos além de seus outros tipos e têm "A criatura equipada recebe +2/+0" e equipar

.
If a Blood token is somehow both a creature and an Equipment, it can't be attached to a creature.
If you control more than one Arterial Alchemy, creatures equipped with Blood Equipment will get +2/+0 for each Arterial Alchemy. The equip cost is still
.
Blood tokens stop being Equipment if Arterial Alchemy leaves the battlefield. If any of them are attached to creatures at that time, they become unattached.
You can't sacrifice a Blood token to pay multiple costs.
If an effect refers to a Blood token, it means any artifact token with the subtype Blood, even if it has gained other subtypes.
Some triggered abilities trigger "whenever you sacrifice a Blood token." These abilities trigger regardless of why you sacrificed that Blood token.