Ravnica Allegiance

Enchantment

{1}{G}{U}: Put a +1/+1 counter on target creature you control.
Whenever one or more +1/+1 counters are put on a creature you control, put that many growth counters on this enchantment.
At the beginning of your upkeep, if this enchantment has twenty or more growth counters on it, you win the game.

Simic Ascendancy

Helga’s Horde

​Strain Foxtrot: [pneumonia]
Virulenance: 7.5/10 
Pathology: The newest addition to the armory. This organism operates via extreme cellular filtration (the "Explore" mechanic). Every combat cycle, the organism rapidly sequences its own DNA—either drawing vital lands to flood the board or permanently mutating its host bodies with +1/+1 counters

pulmonary edema 

Strain Charlie - [Toxoplasma gondii]
Virulence: 8/10
​Pathology: Arguably the most insidious organism in the lab. It exhibits aggressive mimicry and neurological attacks, presenting itself to hosts as a symbiotic "Group Hug" organism. In truth, it feeds on opponents' resources, lowering their threat assessment and immune responses until the strain becomes lethal.

Phantasmagoria

Ants on Ants

Source: https://magic.wizards.com/en/news/announcements/the-lost-caverns-of-ixalan-commander-decklists

Simic Ascendancy

Rules Text

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