Retromancer 
Creature — Lizard Shaman
$0.17 #31274 0.11 28.0 years
Whenever this creature becomes the target of a spell or ability, this creature deals 3 damage to that spell or ability's controller.
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Cards similar to Retromancer expected a card that isn't here?
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Leyline of Combustion91%
$0.41↑#10910↑0.217.3 years↓
"Whenever you and/or at least one permanent you control becomes the target of a spell or ability an opponent controls, this enchantment deals 2 damage to that player."
Mossdog84%
$0.11↓#283910.00↓26.7 years↓
"Whenever this creature becomes the target of a spell or ability an opponent controls, put a +1/+1 counter on this creature."
Thunderbreak Regent84%
$0.25↑#3014↑0.2111.6 years↓
"Whenever a Dragon you control becomes the target of a spell or ability an opponent controls, this creature deals 3 damage to that player."
The Howling Abomination82%
$0.35↑#15132↑0.50↑4.7 years↓
"Whenever this card becomes the target of a spell, it gets +2/+2 until end of turn and deals 2 damage to each opponent."
Bonecrusher Giant // Stomp82%
$0.22↑#6001↑0.127.0 years↓
"Whenever this creature becomes the target of a spell, this creature deals 2 damage to that spell's controller."
Task Force78%
$0.20↑#24699↑0.0527.0 years
"Whenever this creature becomes the target of a spell or ability, it gets +0/+3 until end of turn."
Thorn Lieutenant77%
$0.26↑#22104↑0.068.3 years↓
"Whenever this creature becomes the target of a spell or ability an opponent controls, create a 1/1 green Elf Warrior creature token."
Angelic Protector77%
$0.18↑#254980.00↓29.0 years
"Whenever this creature becomes the target of a spell or ability, this creature gets +0/+3 until end of turn."
Petrahydrox76%
$0.06↓#307350.29↑20.7 years↓
"When this creature becomes the target of a spell or ability, return this creature to its owner's hand."
Mirozel75%
$0.11↓#320860.0628.3 years
"When this creature becomes the target of a spell or ability, return this creature to its owner's hand."
Lava Runner74%
$0.48↑#278560.2027.0 years
"Whenever this creature becomes the target of a spell or ability, that spell or ability's controller sacrifices a land of their choice."
Shield Mare74%
$0.12↓#15475↑0.00↓8.3 years↓
"When this creature enters or becomes the target of a spell or ability an opponent controls, you gain 3 life."
Ashenmoor Liege72%
$0.44↑#16638↑0.22↑18.5 years↓
"Whenever this creature becomes the target of a spell or ability an opponent controls, that player loses 4 life."
Forsaken Wastes71%
$13.99↑#14883↑0.65↑30.0 years↑
"Whenever this enchantment becomes the target of a spell, that spell's controller loses 5 life."
Cephalid Aristocrat71%
$0.14↓#277770.00↓24.7 years↓
"Whenever this creature becomes the target of a spell or ability, mill two cards."
Angelic Cub70%
$0.30↑#15886↑0.00↓3.9 years↓
"Whenever this creature becomes the target of a spell or ability for the first time each turn, put a +1/+1 counter on it."
Tectonic Giant70%
$0.17#3103↑0.096.7 years↓
"Whenever this creature attacks or becomes the target of a spell an opponent controls, choose one —"