Mycosynth Fiend 
Creature — Phyrexian Horror
$0.14 #19315 0.33 15.4 years
This creature gets +1/+1 for each poison counter your opponents have.
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Vishgraz, the Doomhive90%
$1.41↑#6863↑0.53↑3.7 years↓
"this card gets +1/+1 for each poison counter your opponents have."
Distorted Curiosity86%
$0.27↑#11638↑0.62↑3.7 years↓
"This spell costs less to cast if an opponent has three or more poison counters."
less to cast if an opponent has three or more poison counters."
Apostle of Invasion85%
$0.23↑#187020.06↓3.7 years↓
"As long as an opponent has three or more poison counters, this creature has double strike."
Incisor Glider82%
$0.18↑#199620.11↓3.7 years↓
"Whenever this creature attacks, if an opponent has three or more poison counters, creatures you control get +1/+1 until end of turn."
Septic Rats80%
$0.61↑#10376↑0.50↑15.7 years
"Whenever this creature attacks, if defending player is poisoned, it gets +1/+1 until end of turn."
Viridian Betrayers77%
$0.19↑#220460.3515.4 years
"This creature has infect as long as an opponent is poisoned."
Phyrexian Swarmlord77%
$3.27↑#5055↑0.62↑15.4 years
"At the beginning of your upkeep, create a 1/1 green Phyrexian Insect creature token with infect for each poison counter your opponents have."
Viral Spawning76%
$0.22↑#167520.273.7 years↓
"As long as an opponent has three or more poison counters and this card is in your graveyard, it has flashback ."
."
Chained Throatseeker74%
$0.14#216910.2715.4 years
"This creature can't attack unless defending player is poisoned."
Glistening Sphere72%
$13.68↑#2907↑0.50↑3.7 years↓
"
: Add three mana of any one color. Activate only if an opponent has three or more poison counters."
: Add three mana of any one color. Activate only if an opponent has three or more poison counters."
Phyresis Outbreak72%
$12.33↑#3749↑0.69↑3.7 years↓
"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."