By the way, although it is a hypothesis, for anyone other than Kuro and Alice—since Isis's death magic is a power that corresponds to a God's authority—if she had been able to control it perfectly, she could have even fought Fate.
However, if Isis, who has a special efficacy (specialized advantage) against life, does not deal with Life, she will be crushed by an infinite volume (無限の物量 = sheer numbers/literally infinite mass), so that combination is a highly likely defeat.
Ein, who possesses the authority of time, does not hold back Chronois
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Unable to counter Chronois's authority of time, resulting in defeat
Isis, who can completely eradicate infinite military forces with her death magic, does not hold back Life
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Crushed by infinite volume (sheer numbers), resulting in defeat
Since the other two besides Fate also have to match up against opponents they have a special advantage against, the Supreme Gods are strong.
Life's authority of life is a power on the side of the "rules," which is a higher order than magic, so the creation of life—including trees—is invalidated in front of Life.
During the Battle of the God Realm, the reason Lillywood did not create trees except for sealing purposes, and instead focused her maneuvers around supporting Isis, was also because it would have been invalidated.