Tattermunge Duo 
Creature — Goblin Warrior Shaman
$0.11 #30279 0.32 18.5 years
Whenever you cast a red spell, this creature gets +1/+1 until end of turn.
Whenever you cast a green spell, this creature gains forestwalk until end of turn. (It can't be blocked as long as defending player controls a Forest.)
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Mudbrawler Cohort76%
$0.14↑#273300.00↓18.5 years
"This creature gets +1/+1 as long as you control another red creature."
Orbweaver Kumo76%
$0.08↓#311280.12↓22.1 years↑
"Whenever you cast a Spirit or Arcane spell, this creature gains forestwalk until end of turn."
Zuko, Avatar Hunter74%
$0.55↑#13396↑0.22↓0.9 years↓
"Whenever you cast a red spell, create a 2/2 red Soldier creature token."
Emberstrike Duo74%
$0.09↓#303640.00↓18.5 years
"Whenever you cast a red spell, this creature gains first strike until end of turn."
+1 more matching line
Veldrane of Sengir74%
$0.64↑#306960.00↓31.1 years↑
"
: Veldrane gets -3/-0 and gains forestwalk until end of turn."
: Veldrane gets -3/-0 and gains forestwalk until end of turn."
Heartlash Cinder72%
$0.14↑#266520.06↓18.2 years
"When this creature enters, it gets +X/+0 until end of turn, where X is the number of red mana symbols in the mana costs of permanents you control."
Foundry Street Denizen72%
$0.19↑#10581↑0.00↓13.7 years↓
"Whenever another red creature you control enters, this creature gets +1/+0 until end of turn."
Runaway Steam-Kin71%
$1.76↑#1683↑0.328.0 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."
Ember Weaver71%
$0.04↓#279580.06↓17.7 years
"As long as you control a red permanent, this creature gets +1/+0 and has first strike."
Cinder Pyromancer70%
$0.30↑#12811↑0.18↓18.2 years
"Whenever you cast a red spell, you may untap this creature."
Safehold Duo70%
$0.14↑#314330.00↓18.5 years
"Whenever you cast a green spell, this creature gets +1/+1 until end of turn."
+1 more matching line