Pests of Honor 

Creature — Mouse
$0.26 #16651 0.43 3.0 years
Celebration — At the beginning of combat on your turn, if two or more nonland permanents entered the battlefield under your control this turn, put a +1/+1 counter on this creature.
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Savageborn Hydra88%
$0.46↑#11456↑0.31↓13.3 years↑
"This creature enters with X +1/+1 counters on it."
Rushwood Elemental88%
$0.98↑#28048↓0.25↓26.9 years↑
"At the beginning of your upkeep, you may put a +1/+1 counter on this creature."
Child of the Volcano86%
$0.10↓#22835↓0.462.8 years
"At the beginning of your end step, if you descended this turn, put a +1/+1 counter on this creature."
EPF Point Squad86%
$0.09↓#22564↓0.00↓0.5 years↓
"Whenever another creature you control enters, put a +1/+1 counter on this creature."
Celebrity Fencer86%
$0.17↓#183870.23↓4.4 years↑
"Whenever another creature you control enters, put a +1/+1 counter on this creature."
Swarm of Bloodflies85%
$0.09↓#137370.5011.9 years↑
"This creature enters with two +1/+1 counters on it."
Air Nomad Student84%
$0.17↓#24810↓0.00↓0.8 years↓
"At the beginning of your end step, if this creature didn't attack this turn, put a +1/+1 counter on it."
Deep Goblin Skulltaker84%
$0.18↓#186870.00↓2.8 years
"At the beginning of your end step, if you descended this turn, put a +1/+1 counter on this creature."
Ash, Party Crasher84%
$0.15↓#157580.06↓3.0 years
"Whenever this card attacks, if two or more nonland permanents entered the battlefield under your control this turn, put a +1/+1 counter on this card."
Contortionist Troupe84%
$0.16↓#171390.00↓4.9 years↑
"This creature enters with X +1/+1 counters on it."
Botanical Brawler84%
$0.32↑#6758↑0.27↓3.4 years
"This creature enters with two +1/+1 counters on it."
Adaptive Shimmerer84%
$0.12↓#23169↓0.00↓6.4 years↑
"This creature enters with three +1/+1 counters on it."
Faithful Watchdog84%
$0.17↓#8717↑0.24↓2.2 years
"This creature enters with three +1/+1 counters on it."
Fairgrounds Trumpeter83%
$0.10↓#195730.53↑9.9 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."
Juniper Order Ranger82%
$0.15↓#7980↑0.00↓21.0 years↑
"Whenever another creature you control enters, put a +1/+1 counter on that creature and a +1/+1 counter on this creature."