Keleth, Sunmane Familiar 
Legendary Creature — Horse
$0.21 #6749 0.00 5.8 years
Whenever a commander you control attacks, put a +1/+1 counter on it.
Partner (You can have two commanders if both have partner.)
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Anara, Wolvid Familiar90%
$0.79↑#4065↑0.27↑5.8 years
"Partner"
Falthis, Shadowcat Familiar88%
$0.32↑#70080.29↑5.8 years
"Partner"
Esior, Wardwing Familiar86%
$0.64↑#3368↑0.35↑5.8 years
"Partner"
Siani, Eye of the Storm84%
$0.22↑#15861↓0.005.8 years
"Partner"
Armory of Iroas83%
$0.22↑#79370.22↑12.3 years↑
"Whenever equipped creature attacks, put a +1/+1 counter on it."
Armasaur Guide83%
$0.17↓#17748↓0.051.8 years↓
"Whenever you attack with three or more creatures, put a +1/+1 counter on target creature you control."
Bone Sabres82%
$5.73↑#59580.24↑3.9 years↓
"Whenever equipped creature attacks, put four +1/+1 counters on it."
Stumpsquall Hydra82%
$0.52↑#13181↓0.12↑5.8 years
"When this creature enters, distribute X +1/+1 counters among it and any number of commanders."
Drillworks Mole82%
$0.25↑#10012↓0.26↑4.2 years↓
"
, 
: Put a +1/+1 counter on this creature and a +1/+1 counter on up to one target commander creature you control."
, : Put a +1/+1 counter on this creature and a +1/+1 counter on up to one target commander creature you control."
Flaming Fist82%
$0.30↑#4988↑0.29↑4.2 years↓
"Commander creatures you own have "Whenever this creature attacks, it gains double strike until end of turn.""
Norn's Choirmaster82%
$13.10↑#3372↑0.26↑3.6 years↓
"Whenever a commander you control enters or attacks, proliferate."
Rograkh, Son of Rohgahh82%
$1.83↑#2355↑0.66↑5.8 years
"Partner"
Master Chef81%
$0.22↑#4237↑0.20↑4.2 years↓
"Commander creatures you own have "This creature enters with an additional +1/+1 counter on it" and "Other creatures you control enter with an additional +1/+1 counter on them.""
Numa, Joraga Chieftain80%
$0.24↑#13190↓0.60↑5.8 years
"Partner"
Gleam of Battle80%
$0.16↓#13575↓0.20↑13.3 years↑
"Whenever a creature you control attacks, put a +1/+1 counter on it."
Jocasta, Automaton Avenger80%
$0.39↑#14468↓0.000.2 years↓
"Whenever your commander deals combat damage to a player, put a +1/+1 counter on this card."
Agent of the Shadow Thieves80%
$0.27↑#5398↑0.33↑4.2 years↓
"Commander creatures you own have "Whenever this creature attacks a player, if no opponent has more life than that player, put a +1/+1 counter on this creature. It gains deathtouch and indestructible until end of turn.""
Loyal Guardian79%
$0.21#3007↑0.15↑8.1 years↑
"At the beginning of combat on your turn, if you control your commander, put a +1/+1 counter on each creature you control."
Armix, Filigree Thrasher79%
$0.28↑#60610.23↑5.8 years
"Partner"
Black Panther, Claws of Bast78%
$2.06↑#22263↓0.000.2 years↓
"Whenever a creature you control attacks alone, put a +1/+1 counter on it."