Stalwart Successor 
Creature — Human Warrior
$0.19 #13649 0.20 1.5 years
Menace (This creature can't be blocked except by two or more creatures.)
Whenever one or more counters are put on a creature you control, if it's the first time counters have been put on that creature this turn, put a +1/+1 counter on that creature.
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Deep Goblin Skulltaker96%
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Luminarch Aspirant90%
$0.36↑#3910↑0.06↓6.1 years↑
"At the beginning of combat on your turn, put a +1/+1 counter on target creature you control."
Enduring Scalelord90%
$0.13↓#114390.00↓11.6 years↑
"Whenever one or more +1/+1 counters are put on another creature you control, you may put a +1/+1 counter on this creature."
Stormblood Berserker88%
$0.06↓#24245↓0.00↓15.3 years↑
"Menace"
Air Nomad Student88%
$0.17↓#24735↓0.09↓0.9 years
"At the beginning of your end step, if this creature didn't attack this turn, put a +1/+1 counter on it."
Loxodon Battle Priest88%
$0.17↓#18609↓0.05↓1.5 years
"At the beginning of combat on your turn, put a +1/+1 counter on another target creature you control."
Botanical Brawler87%
$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."
Demon Wall87%
$0.23↑#160460.281.4 years
"Menace"
Knight of Wundagore86%
$0.08↓#19783↓0.110.3 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."
Judge Magister Gabranth86%
$0.19#9166↑0.251.4 years
"Menace"
Rushwood Elemental84%
$1.04↑#28334↓0.00↓27.0 years↑
"At the beginning of your upkeep, you may put a +1/+1 counter on this creature."
Contortionist Troupe84%
$0.20↑#17477↓0.275.1 years↑
"At the beginning of your end step, if you control three or more creatures with different powers, put a +1/+1 counter on target creature you control."
Spider-Man Noir84%
$0.24↑#8845↑0.06↓1.1 years
"Menace"
Juniper Order Ranger84%
$0.15↓#8248↑0.1821.2 years↑
"Whenever another creature you control enters, put a +1/+1 counter on that creature and a +1/+1 counter on this creature."
Odric's Outrider84%
$0.23↑#20268↓0.06↓5.1 years↑
"Whenever this creature or another creature you control dies, put a +1/+1 counter on target creature you control."
Grime Gorger84%
$0.24↑#22293↓0.124.5 years↑
"Menace"
Cursed Wombat83%
$0.23↑#110770.00↓2.3 years
"Permanents you control have "Whenever one or more +1/+1 counters are put on this permanent, put an additional +1/+1 counter on it. This ability triggers only once each turn.""
Tempered Veteran83%
$0.14↓#23281↓0.00↓6.3 years↑
"
, 
: Put a +1/+1 counter on target creature with a +1/+1 counter on it."
, : Put a +1/+1 counter on target creature with a +1/+1 counter on it."
Fairgrounds Trumpeter82%
$0.09↓#19957↓0.00↓10.1 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."