Wildwood Scourge 
Creature — Hydra
$0.18 #3748 0.14 6.3 years
This creature enters with X +1/+1 counters on it.
Whenever one or more +1/+1 counters are put on another non-Hydra creature you control, put a +1/+1 counter on this creature.
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Cards similar to Wildwood Scourge expected a card that isn't here?
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Enduring Scalelord86%
$0.13↓#11439↓0.00↓11.6 years↑
"Whenever one or more +1/+1 counters are put on another creature you control, you may put a +1/+1 counter on this creature."
Botanical Brawler86%
$0.26↑#6899↓0.063.5 years↓
"Whenever one or more +1/+1 counters are put on another permanent you control, if it's the first time +1/+1 counters have been put on that permanent this turn, put a +1/+1 counter on this creature."
+1 more matching line
Knight of Wundagore85%
$0.08↓#19783↓0.110.3 years↓
"Whenever you put a +1/+1 counter on another creature, put a +1/+1 counter on this creature. This ability triggers only once each turn."
Junk Golem84%
$0.23↑#30323↓0.00↓25.1 years↑
"This creature enters with three +1/+1 counters on it."
Fairgrounds Trumpeter82%
$0.09↓#19957↓0.00↓10.1 years↑
"At the beginning of each end step, if a +1/+1 counter was put on a permanent under your control this turn, put a +1/+1 counter on this creature."
Walking Archive82%
$2.97↑#12530↓0.35↑20.5 years↑
"This creature enters with a +1/+1 counter on it."
Scrounging Bandar81%
$0.15↓#8879↓0.00↓9.7 years↑
"This creature enters with two +1/+1 counters on it."
Lily Bowen, Raging Grandma81%
$0.46↑#7080↓0.25↑2.6 years↓
"this card enters with two +1/+1 counters on it."
Mossborn Hydra80%
$13.45↑#747↑0.95↑1.9 years↓
"This creature enters with a +1/+1 counter on it."
Noosegraf Mob80%
$0.27↑#11109↓0.1310.2 years↑
"This creature enters with five +1/+1 counters on it."
Hagra Constrictor80%
$0.17↓#9173↓0.196.1 years
"This creature enters with two +1/+1 counters on it."
Big Mother Mouser80%
$1.28↑#4796↓0.31↑0.6 years↓
"This creature enters with two +1/+1 counters on it."
Salt Road Quartermasters80%
$0.05↓#29352↓0.31↑11.6 years↑
"This creature enters with two +1/+1 counters on it."
Swarm of Bloodflies80%
$0.08↓#13969↓0.36↑12.1 years↑
"This creature enters with two +1/+1 counters on it."
Selfless Police Captain79%
$0.08↓#15436↓0.00↓1.1 years↓
"This creature enters with a +1/+1 counter on it."
Anthroplasm79%
$0.54↑#26132↓0.00↓27.7 years↑
"This creature enters with two +1/+1 counters on it."
Faithful Watchdog78%
$0.19↑#8980↓0.00↓2.3 years↓
"This creature enters with three +1/+1 counters on it."
Adaptive Shimmerer78%
$0.10↓#23305↓0.226.5 years
"This creature enters with three +1/+1 counters on it."
Steel Dromedary78%
$0.21↑#23928↓0.00↓5.3 years
"This creature enters tapped with two +1/+1 counters on it."
Iron Apprentice78%
$0.26↑#6095↓0.114.7 years↓
"This creature enters with a +1/+1 counter on it."