Madame Null, Power Broker 
Legendary Creature — Demon Advisor
$0.38 #10226 0.00 0.5 years
Deathtouch
Whenever another creature you control enters, you may pay life equal to its power. If you do, put that many +1/+1 counters on it.
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Railway Brawler92%
$5.84↑#2492↑0.36↑2.4 years↑
"Whenever another creature you control enters, put X +1/+1 counters on it, where X is its power."
Devilish Valet83%
$0.33↓#3426↑0.38↑4.4 years↑
"Whenever another creature you control enters, double this creature's power until end of turn."
Good-Fortune Unicorn82%
$0.20↓#3509↑0.17↑7.2 years↑
"Whenever another creature you control enters, put a +1/+1 counter on that creature."
Shelinda, Yevon Acolyte80%
$0.25↓#5586↑0.47↑1.2 years
"Whenever another creature you control enters, put a +1/+1 counter on that creature if its power is less than this card's power. Otherwise, put a +1/+1 counter on this card."
Juniper Order Ranger80%
$0.15↓#7980↑0.0021.0 years↑
"Whenever another creature you control enters, put a +1/+1 counter on that creature and a +1/+1 counter on this creature."
God-Eternal Rhonas80%
$5.39↑#4962↑0.38↑7.3 years↑
"Deathtouch"
Treetop Snarespinner78%
$0.21↓#84840.19↑1.8 years↑
"Deathtouch"
Hamletback Goliath78%
$0.19↓#90360.0018.9 years↑
"Whenever another creature enters, you may put X +1/+1 counters on this creature, where X is that creature's power."
Serra Redeemer76%
$0.29↓#88290.28↑4.0 years↑
"Whenever another creature you control with power 2 or less enters, put two +1/+1 counters on that creature."
Ezuri, Claw of Progress76%
$1.80↑#5626↑0.74↑10.8 years↑
"Whenever a creature you control with power 2 or less enters, you get an experience counter."
EPF Point Squad76%
$0.09↓#22564↓0.000.5 years
"Whenever another creature you control enters, put a +1/+1 counter on this creature."
Celebrity Fencer76%
$0.17↓#18387↓0.23↑4.4 years↑
"Whenever another creature you control enters, put a +1/+1 counter on this creature."
Tribute to the World Tree76%
$13.68↑#604↑0.42↑3.4 years↑
"Whenever a creature you control enters, draw a card if its power is 3 or greater. Otherwise, put two +1/+1 counters on it."
Thickest in the Thicket76%
$0.50↑#2999↑0.22↑2.1 years↑
"When this enchantment enters, put X +1/+1 counters on target creature, where X is that creature's power."
Hulkling, Burgeoning Bruiser74%
$0.19↓#22539↓0.000.2 years
"Whenever another creature you control enters, if it has greater power or toughness than this card, put a +1/+1 counter on this card."
Durable Handicraft73%
$0.11↓#20314↓0.009.9 years↑
"Whenever a creature you control enters, you may pay 
. If you do, put a +1/+1 counter on that creature."
. If you do, put a +1/+1 counter on that creature."
Yorvo, Lord of Garenbrig73%
$0.38#93640.40↑6.9 years↑
"Whenever another green creature you control enters, put a +1/+1 counter on this card. Then if that creature's power is greater than this card's power, put another +1/+1 counter on this card."
Nazgûl73%
$22.27↑#2940↑0.42↑3.2 years↑
"Deathtouch"
Experiment Twelve72%
$0.32↓#7917↑0.072.6 years↑
"Whenever this creature or another creature you control is turned face up, put +1/+1 counters on that creature equal to its power."
Ouroboroid72%
$34.16↑#1642↑0.63↑1.1 years
"At the beginning of combat on your turn, put X +1/+1 counters on each creature you control, where X is this creature's power."