Poison Synergy

Cards that advance a poison-counter win by piling on poison counters or multiplying them. Phyresis Outbreak and Ichor Rats hand opponents poison counters outright, Hand of the Praetors buffs infect creatures and adds poison on cast, and proliferate engines like Atraxa, Praetors' Voice, Inexorable Tide, and Viral Drake grow every existing poison counter. Distinct from Corrupted, which rewards a card once an opponent already holds three or more poison counters rather than building toward that threshold.