Forgotten Ancient 
Creature — Elemental
$0.38 #390 0.37 23.3 years
Whenever a player casts a spell, you may put a +1/+1 counter on this creature.
At the beginning of your upkeep, you may move any number of +1/+1 counters from this creature onto other creatures.
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Cards similar to Forgotten Ancient expected a card that isn't here?
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Managorger Hydra94%
$0.99↑#997↓0.48↑11.1 years↓
"Whenever a player casts a spell, put a +1/+1 counter on this creature."
Taurean Mauler90%
$0.56↑#947↓0.3118.6 years↓
"Whenever an opponent casts a spell, you may put a +1/+1 counter on this creature."
Ishai, Ojutai Dragonspeaker85%
$3.29↑#4668↓0.59↑9.8 years↓
"Whenever an opponent casts a spell, put a +1/+1 counter on this card."
Sunscorch Regent85%
$0.30↓#1686↓0.2911.4 years↓
"Whenever an opponent casts a spell, put a +1/+1 counter on this creature and you gain 1 life."
Titania's Chosen82%
$0.31↓#17141↓0.06↓27.9 years↑
"Whenever a player casts a green spell, put a +1/+1 counter on this creature."
Thundering Mightmare82%
$0.39↑#10837↓0.334.8 years↓
"As long as this card is paired with another creature, each of those creatures has "Whenever an opponent casts a spell, put a +1/+1 counter on this creature.""
Scrounging Bandar82%
$0.15↓#8773↓0.299.6 years↓
"At the beginning of your upkeep, you may move any number of +1/+1 counters from this creature onto another target creature."
Noosegraf Mob82%
$0.29↓#10793↓0.3310.1 years↓
"Whenever a player casts a spell, remove a +1/+1 counter from this creature. If you do, create a 2/2 black Zombie creature token."
Predatory Hunger82%
$0.65↑#10710↓0.00↓28.2 years↑
"Whenever an opponent casts a creature spell, put a +1/+1 counter on enchanted creature."
Medusa, Inhuman Queen79%
$0.27↓#18977↓0.00↓0.2 years↓
"Whenever a player casts a noncreature spell, put a +1/+1 counter on this card."
Mold Adder78%
$0.11↓#14542↓0.00↓17.1 years↓
"Whenever an opponent casts a blue or black spell, you may put a +1/+1 counter on this creature."
Witchstalker78%
$0.25↓#19122↓0.2713.1 years↓
"Whenever an opponent casts a blue or black spell during your turn, put a +1/+1 counter on this creature."
Steel Dromedary78%
$0.17↓#23592↓0.00↓5.2 years↓
"At the beginning of combat on your turn, you may move a +1/+1 counter from this creature onto target creature."
+1 more matching line
Cytoplast Root-Kin76%
$0.13↓#18314↓0.13↓20.3 years↓
"
: Move a +1/+1 counter from target creature you control onto this creature."
: Move a +1/+1 counter from target creature you control onto this creature."
Steelburr Champion76%
$0.28↓#6838↓0.24↓2.1 years↓
"Whenever an opponent casts a noncreature spell, put a +1/+1 counter on this creature."
Arcbound Fiend75%
$0.37↓#13119↓0.4022.6 years
"At the beginning of your upkeep, you may move a +1/+1 counter from target creature onto this creature."
Aetherborn Marauder75%
$0.07↓#16621↓0.329.9 years↓
"When this creature enters, move any number of +1/+1 counters from other permanents you control onto this creature."
Citanul Druid74%
$8.63↑#28175↓0.53↑32.5 years↑
"Whenever an opponent casts an artifact spell, put a +1/+1 counter on this creature."
Fairgrounds Trumpeter74%
$0.10↓#19573↓0.53↑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."
Knight of Wundagore74%
$0.09↓#21078↓0.00↓0.2 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."