Primal Cocoon 
Enchantment — Aura
$0.18 #24159 0.38 16.1 years
Enchant creature
At the beginning of your upkeep, put a +1/+1 counter on enchanted creature.
When enchanted creature attacks or blocks, sacrifice this Aura.
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Forced Adaptation90%
$0.17↓#8317↑0.50↑13.6 years↓
"At the beginning of your upkeep, put a +1/+1 counter on enchanted creature."
+1 more matching line
Vebulid84%
$0.69↑#261830.00↓27.9 years↑
"At the beginning of your upkeep, you may put a +1/+1 counter on this creature."
+1 more matching line
Mardu Blazebringer81%
$0.07↓#30695↓0.00↓11.9 years↓
"When this creature attacks or blocks, sacrifice it at end of combat."
Fog Elemental80%
$0.11↓#29231↓0.00↓29.2 years↑
"When this creature attacks or blocks, sacrifice it at end of combat."
Ferocity78%
$0.23↑#241500.3126.9 years↑
"Whenever enchanted creature blocks or becomes blocked, you may put a +1/+1 counter on it."
Daily Regimen77%
$0.09↓#223470.00↓18.6 years↑
"
: Put a +1/+1 counter on enchanted creature."
: Put a +1/+1 counter on enchanted creature."+1 more matching line
Ceremonial Guard77%
$0.13↓#31910↓0.00↓26.9 years↑
"When this creature attacks or blocks, destroy it at end of combat."
Cunning76%
$0.06↓#30385↓0.57↑28.2 years↑
"When enchanted creature attacks or blocks, sacrifice this Aura at the beginning of the next cleanup step."
+1 more matching line
Rotting Giant76%
$0.31↑#31107↓0.00↓24.9 years↑
"Whenever this creature attacks or blocks, sacrifice it unless you exile a card from your graveyard."
Loxodon Battle Priest76%
$0.17↓#18504↑0.03↓1.4 years↓
"At the beginning of combat on your turn, put a +1/+1 counter on another target creature you control."
Luminarch Aspirant76%
$0.36↑#3836↑0.16↓5.9 years↓
"At the beginning of combat on your turn, put a +1/+1 counter on target creature you control."
Clockwork Vorrac76%
$0.12↓#249890.00↓22.9 years↑
"Whenever this creature attacks or blocks, remove a +1/+1 counter from it at end of combat."
Seismic Tutelage74%
$0.88↑#11409↑0.00↓0.8 years↓
"When this Aura enters, put a +1/+1 counter on enchanted creature."
+1 more matching line
Shape of the Wiitigo74%
$0.41↑#253320.2920.1 years↑
"When this Aura enters, put six +1/+1 counters on enchanted creature."
+2 more matching lines
Armory of Iroas74%
$0.22↑#7937↑0.22↓12.3 years↓
"Whenever equipped creature attacks, put a +1/+1 counter on it."
Bone Sabres74%
$5.73↑#5958↑0.24↓3.9 years↓
"Whenever equipped creature attacks, put four +1/+1 counters on it."
Runaway Carriage73%
$0.06↓#283120.21↓10.4 years↓
"When this creature attacks or blocks, sacrifice it at end of combat."
Hydra's Growth72%
$1.08↑#2107↑0.346.6 years↓
"At the beginning of your upkeep, double the number of +1/+1 counters on enchanted creature."
Sinister Possession72%
$0.09↓#18361↑0.00↓13.3 years↓
"Whenever enchanted creature attacks or blocks, its controller loses 2 life."
Contaminated Bond72%
$0.10↓#197180.12↓22.9 years↑
"Whenever enchanted creature attacks or blocks, its controller loses 3 life."
+1 more matching line