Better cards than Serum Sovereign

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Serum Sovereign — Creature — Phyrexian Sphinx · 4 U

Flying
Whenever you cast a noncreature spell, put an oil counter on this creature.
{U}, Remove an oil counter from this creature: Draw a card, then scry 2.

No upgrades have been published for Serum Sovereign yet — neither the algorithm nor the community has found one.

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