Quirion Dryad 

Creature — Dryad
$0.09 #25294 0.13 25.7 years
Whenever you cast a spell that's white, blue, black, or red, put a +1/+1 counter on this creature.
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Questing Druid // Seek the Beast96%
$0.35↑#8702↑0.113.1 years↓
"Whenever you cast a spell that's white, blue, black, or red, put a +1/+1 counter on this creature."
God-Pharaoh's Faithful89%
$0.14↑#209730.109.3 years↓
"Whenever you cast a blue, black, or red spell, you gain 1 life."
Emberstrike Duo82%
$0.09#30364↓0.00↓18.5 years↓
"Whenever you cast a black spell, this creature gets +1/+1 until end of turn."
Thistledown Duo78%
$0.09#30778↓0.00↓18.5 years↓
"Whenever you cast a white spell, this creature gets +1/+1 until end of turn."
Runaway Steam-Kin76%
$1.76↑#1683↑0.32↑8.0 years↓
"Whenever you cast a red spell, if this creature has fewer than three +1/+1 counters on it, put a +1/+1 counter on this creature."
Riverfall Mimic76%
$0.11↑#31713↓0.1218.2 years↓
"Whenever you cast a spell that's both blue and red, this creature has base power and toughness 3/3 until end of turn and can't be blocked this turn."
Gravelgill Duo76%
$0.11↑#300480.0518.5 years↓
"Whenever you cast a blue spell, this creature gets +1/+1 until end of turn."
Battlegate Mimic75%
$0.08↓#264650.00↓18.2 years↓
"Whenever you cast a spell that's both red and white, this creature has base power and toughness 4/2 until end of turn and gains first strike until end of turn."
Battle Brawler75%
$0.14↑#250950.1711.7 years↓
"As long as you control a red or white permanent, this creature gets +1/+0 and has first strike."
Minotaur Tactician75%
$0.06↓#32131↓0.00↓25.4 years
"This creature gets +1/+1 as long as you control a white creature."
Nightsky Mimic74%
$0.18↑#30593↓0.00↓18.2 years↓
"Whenever you cast a spell that's both white and black, this creature has base power and toughness 4/4 until end of turn and gains flying until end of turn."
Mountain Titan74%
$0.58↑#32012↓0.00↓31.4 years↑
"

: Until end of turn, whenever you cast a black spell, put a +1/+1 counter on this creature."
K'rrik, Son of Yawgmoth73%
$1.08↑#1080↑1.39↑7.2 years↓
"Whenever you cast a black spell, put a +1/+1 counter on this card."
Bloodhall Ooze73%
$0.50↑#217720.00↓17.7 years↓
"At the beginning of your upkeep, if you control a black permanent, you may put a +1/+1 counter on this creature."
Aragorn, the Uniter72%
$5.02↑#3411↑0.65↑3.3 years↓
"Whenever you cast a white spell, create a 1/1 white Human Soldier creature token."
Zuko, Avatar Hunter72%
$0.55↑#13396↑0.220.9 years↓
"Whenever you cast a red spell, create a 2/2 red Soldier creature token."
Dega Sanctuary72%
$0.24↑#277160.1825.4 years
"At the beginning of your upkeep, if you control a black or red permanent, you gain 2 life. If you control a black permanent and a red permanent, you gain 4 life instead."
Abzan Kin-Guard71%
$0.07↓#280000.25↑11.7 years↓
"This creature has lifelink as long as you control a white or black permanent."
Mage Tower Referee70%
$0.11↑#236260.01↓0.5 years↓
"Whenever you cast a multicolored spell, put a +1/+1 counter on this creature."