Path of blood

Path (At the beginning of each of your upkeep steps
put a path counter on this card. This enchantment
gains effects based on how many path counters it has).
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Whenever you cast a black spell you may pay 2
life to reduce that spell's cost by {b}.
2+ path counters-----------------------------------------
Whenever a creature you control dies each
opponent loses 1 life and you gain 1 life.
4+ path counters-------------------------