Growth Curve 
Sorcery
$0.27 #10370 0.00 0.4 years
Put a +1/+1 counter on target creature you control, then double the number of +1/+1 counters on that creature.
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Invigorating Surge92%
$0.24↓#3540↑0.21↑6.2 years↑
"Put a +1/+1 counter on target creature you control, then double the number of +1/+1 counters on that creature."
Study the Classics90%
$0.27#15761↓0.000.5 years
"Put a +1/+1 counter on target creature, then double the number of +1/+1 counters on it. You gain life equal to the number of +1/+1 counters on that creature."
Branching Evolution87%
$6.36↑#370↑0.44↑6.1 years↑
"If one or more +1/+1 counters would be put on a creature you control, twice that many +1/+1 counters are put on that creature instead."
Corpsejack Menace87%
$0.36↑#1552↑0.35↑13.9 years↑
"If one or more +1/+1 counters would be put on a creature you control, twice that many +1/+1 counters are put on it instead."
Fangs of Kalonia86%
$0.34↑#2507↑0.25↑2.2 years↑
"Put a +1/+1 counter on target creature you control, then double the number of +1/+1 counters on each creature that had a +1/+1 counter put on it this way."
Biogenic Upgrade84%
$0.12↓#89800.43↑7.6 years↑
"Distribute three +1/+1 counters among one, two, or three target creatures, then double the number of +1/+1 counters on each of those creatures."
Visions of Dominance83%
$0.77↑#7759↑0.13↑4.9 years↑
"Put a +1/+1 counter on target creature, then double the number of +1/+1 counters on it."
Tanazir Quandrix80%
$0.28↑#84510.44↑5.4 years↑
"When this card enters, double the number of +1/+1 counters on target creature you control."
Shang-Chi, Martial Mentor80%
$0.61↑#18357↓0.000.2 years
"If one or more +1/+1 counters would be put on a creature you control, twice that many +1/+1 counters are put on that creature instead."
The Earth Crystal80%
$13.76↑#723↑0.42↑1.2 years
"If one or more +1/+1 counters would be put on a creature you control, twice that many +1/+1 counters are put on that creature instead."
Sage of the Fang79%
$0.22↓#14565↓0.11↑1.4 years↑
"When this creature enters, put a +1/+1 counter on target creature."
The First Tyrannic War78%
$0.66↑#111450.33↑3.9 years↑
"Double the number of each kind of counter on target creature you control."
Solidarity of Heroes78%
$0.65↑#6186↑0.18↑12.3 years↑
"Choose any number of target creatures. Double the number of +1/+1 counters on each of them."
Michelangelo, Weirdness to 1178%
$2.57↑#5190↑0.000.5 years
"If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on it instead."
Ornery Tumblewagg76%
$0.34↑#4990↑0.90↑2.4 years↑
"At the beginning of combat on your turn, put a +1/+1 counter on target creature."
Hardened Scales76%
$2.33↑#186↑0.42↑11.9 years↑
"If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on it instead."
Ascendant Acolyte76%
$0.34↑#109920.064.5 years↑
"This creature enters with a +1/+1 counter on it for each +1/+1 counter among other creatures you control."
Lifecrafter's Gift75%
$0.06↓#15832↓0.11↑9.6 years↑
"Put a +1/+1 counter on target creature, then put a +1/+1 counter on each creature you control with a +1/+1 counter on it."
Voracious Hydra74%
$0.28↑#2738↑0.29↑7.2 years↑
"• Double the number of +1/+1 counters on this creature."
Court of Garenbrig74%
$16.53↑#2224↑0.40↑3.0 years↑
"At the beginning of your upkeep, distribute two +1/+1 counters among up to two target creatures. Then if you're the monarch, double the number of +1/+1 counters on each creature you control."