Spireside Infiltrator 
Creature — Human Rogue
$0.10 #22746 0.06 9.9 years
Whenever this creature becomes tapped, it deals 1 damage to each opponent.
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Cards similar to Spireside Infiltrator expected a card that isn't here?
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Hawkeye's Bow93%
$0.25↑#12136↑0.000.2 years↓
"Whenever equipped creature becomes tapped, it deals 1 damage to each opponent."
Zhur-Taa Druid88%
$0.18↑#4187↑0.24↑13.3 years↑
"Whenever you tap this creature for mana, it deals 1 damage to each opponent."
Manabarbs87%
$4.32↑#2215↑1.24↑33.1 years↑
"Whenever a player taps a land for mana, this enchantment deals 1 damage to that player."
Panicked Altisaur85%
$0.18↑#13639↑0.072.8 years↓
"
: This creature deals 2 damage to each opponent."
: This creature deals 2 damage to each opponent."
Insolence84%
$0.10#29186↓0.31↑25.6 years↑
"Whenever enchanted creature becomes tapped, this Aura deals 2 damage to that creature's controller."
Psychic Venom84%
$0.13↑#243180.19↑33.1 years↑
"Whenever enchanted land becomes tapped, this Aura deals 2 damage to that land's controller."
Lasting Tarfire82%
$0.25↑#6536↑0.000.6 years↓
"At the beginning of each end step, if you put a counter on a creature this turn, this enchantment deals 2 damage to each opponent."
Goblin Medics82%
$0.10#183200.50↑27.6 years↑
"Whenever this creature becomes tapped, it deals 1 damage to any target."
Night Market Lookout80%
$0.21↑#13021↑0.25↑9.9 years
"Whenever this creature becomes tapped, each opponent loses 1 life and you gain 1 life."
Haunting Wind79%
$16.29↑#254440.67↑32.5 years↑
"Whenever an artifact becomes tapped or a player activates an artifact's ability without in its activation cost, this enchantment deals 1 damage to that artifact's controller."
in its activation cost, this enchantment deals 1 damage to that artifact's controller."
Glassworks // Shattered Yard79%
$0.20↑#8782↑0.19↑1.9 years↓
"At the beginning of your end step, this Room deals 1 damage to each opponent."
Breath of Malfegor78%
$0.17↑#13677↑0.0017.3 years↑
"this card deals 5 damage to each opponent."
Sizzle78%
$0.21↑#15625↑0.16↑26.9 years↑
"this card deals 3 damage to each opponent."
Storm Caller78%
$0.11↑#219940.076.2 years↓
"When this creature enters, it deals 2 damage to each opponent."
Welder Automaton78%
$0.06↓#243190.009.6 years
"
: This creature deals 1 damage to each opponent."
: This creature deals 1 damage to each opponent."
Shivan Gorge78%
$0.96↑#2346↑0.1327.9 years↑
", : this card deals 1 damage to each opponent."
, : this card deals 1 damage to each opponent."
Scald77%
$0.29↑#253970.20↑27.9 years↑
"Whenever a player taps an Island for mana, this enchantment deals 1 damage to that player."
Teapot Slinger77%
$0.20↑#8697↑0.29↑2.1 years↓
"Whenever you expend 4, this creature deals 2 damage to each opponent."
Wildfire Awakener76%
$3.34↑#6059↑0.36↑3.4 years↓
"When this creature enters, create X 1/1 red Elemental creature tokens with "Whenever this token becomes tapped, it deals 1 damage to target player.""
Tunneling Geopede76%
$0.29↑#4909↑0.1410.9 years
"Whenever a land you control enters, this creature deals 1 damage to each opponent."