
Each opponent gets a poison counter. Then each creature your opponents control gets -1/-1 until end of turn for each poison counter its controller has.
Phyresis Outbreak has 2 printings, first in Phyrexia: All Will Be One Commander (2023). EDHREC ranks it #3,750 among Commander cards. It appears most in Atraxa, Praetors' Voice decks (13,682 on EDHREC). 1 public deck on TCG runs it. It has 1 official ruling.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.