"I was there when Phyrexia doomed Serra's realm with a single touch. I was there when Yawgmoth tried and failed to conquer Dominaria. And I will still be here when Elesh Norn lies dead."
At the beginning of your upkeep, you may put a verse counter on Serra's Hymn. Sacrifice Serra's Hymn: Prevent the next X damage that would be dealt this turn to any number of targets, divided as you choose, where X is the number of verse counters on Serra's Hymn.
Serrated Arrows enters the battlefield with three arrowhead counters on it. At the beginning of your upkeep, if there are no arrowhead counters on Serrated Arrows, sacrifice it. {T}, Remove an arrowhead counter from Serrated Arrows: Put a -1/-1 counter on target creature.
Whenever Serum Tank or another artifact enters the battlefield, put a charge counter on Serum Tank. {3}, {T}, Remove a charge counter from Serum Tank: Draw a card.
Serum was once derived from Mirrodin's blinkmoths, offering visions of inspiration. Now it is pulled from Phyrexian inkmoths, yielding visions of perfection.
Flying Whenever you cast a noncreature spell, put an oil counter on Serum-Core Chimera. Remove three oil counters from Serum-Core Chimera: Draw a card. Then you may discard a nonland card. When you discard a card this way, Serum-Core Chimera deals 3 damage to target creature or planeswalker. Activate only as a sorcery.