Primordial Hydra 
Creature — Hydra
$1.37 #2429 0.55 15.3 years
This creature enters with X +1/+1 counters on it.
At the beginning of your upkeep, double the number of +1/+1 counters on this creature.
This creature has trample as long as it has ten or more +1/+1 counters on it.
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Ascendant Acolyte98%
$0.32↓#11286↓0.29↓4.7 years↓
"At the beginning of your upkeep, double the number of +1/+1 counters on this creature."
+1 more matching line
Solarion90%
$0.63↓#22379↓0.21↓22.4 years↑
"
: Double the number of +1/+1 counters on this creature."
: Double the number of +1/+1 counters on this creature."
Baloth Pup90%
$0.11↓#26155↓0.06↓10.7 years↓
"This creature has trample as long as it has a +1/+1 counter on it."
Hydra's Growth89%
$1.23↓#21560.34↓6.7 years↓
"At the beginning of your upkeep, double the number of +1/+1 counters on enchanted creature."
Lily Bowen, Raging Grandma88%
$0.46↓#7080↓0.25↓2.6 years↓
"At the beginning of your upkeep, double the number of +1/+1 counters on this card if its power is 16 or less. Otherwise, remove all but one +1/+1 counter from it, then you gain 1 life for each +1/+1 counter removed this way."
+1 more matching line
Mossborn Hydra87%
$13.45↑#747↑0.95↑1.9 years↓
"Whenever a land you control enters, double the number of +1/+1 counters on this creature."
+1 more matching line
Pelt Collector86%
$0.36↓#15214↓0.00↓8.0 years↓
"As long as this creature has three or more +1/+1 counters on it, it has trample."
Kalonian Hydra86%
$6.14↑#1136↑0.4813.3 years↓
"Whenever this creature attacks, double the number of +1/+1 counters on each creature you control."
+1 more matching line
Chaos Imps86%
$0.26↓#23454↓0.07↓14.0 years↓
"This creature has trample as long as it has a +1/+1 counter on it."
Ornery Tumblewagg84%
$0.36↓#5181↓0.22↓2.5 years↓
"At the beginning of combat on your turn, put a +1/+1 counter on target creature."
Fractal Harness84%
$0.25↓#6379↓0.29↓5.5 years↓
"When this Equipment enters, create a 0/0 green and blue Fractal creature token. Put X +1/+1 counters on it and attach this Equipment to it."
Dragonsguard Elite84%
$0.22↓#16643↓0.07↓5.5 years↓
"
: Double the number of +1/+1 counters on this creature."
: Double the number of +1/+1 counters on this creature."
Voracious Hydra84%
$0.26↓#27490.28↓7.3 years↓
"• Double the number of +1/+1 counters on this creature."
+1 more matching line
Big Mother Mouser84%
$1.28↓#4796↓0.31↓0.6 years↓
"Whenever this creature attacks, double the number of +1/+1 counters on it."
+1 more matching line
Sisterhood of Karn84%
$0.23↓#12410↓0.37↓3.0 years↓
"Whenever you cast a spell from anywhere other than your hand, double the number of +1/+1 counters on this creature."
+1 more matching line
Bristly Bill, Spine Sower83%
$24.37↑#918↑1.00↑2.5 years↓
"
: Double the number of +1/+1 counters on each creature you control."
: Double the number of +1/+1 counters on each creature you control."
Sage of the Fang83%
$0.19↓#14607↓0.07↓1.5 years↓
"When this creature enters, put a +1/+1 counter on target creature."
Byrke, Long Ear of the Law82%
$7.22↑#6029↓0.14↓2.2 years↓
"Whenever a creature you control with a +1/+1 counter on it attacks, double the number of +1/+1 counters on it."
Knight of Wundagore81%
$0.08↓#19783↓0.11↓0.3 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."
Botanical Brawler80%
$0.26↓#6899↓0.06↓3.5 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