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2023-09-01 If you control more than one Grave Pact and a creature you control dies, each of the triggered abilities will trigger

For five mana, this five-loyalty Ajani's +2 may gain life, an effect known for not being particularly powerful, but it gains you one life for each creature you control, meaning this effect can potentially bolster your life total significantly, especially if used several times

Repeat for infinite mana

For the same reason that phasing works similarly

But if your deck supports the theme, perhaps because of a commander like Kalamax, the Stormsire, its an invaluable investment that takes over games in short order