Parasitic Impetus 
Enchantment — Aura
$0.13 #2816 0.19 6.4 years
Enchant creature
Enchanted creature gets +2/+2 and is goaded. (It attacks each combat if able and attacks a player other than you if able.)
Whenever enchanted creature attacks, its controller loses 2 life and you gain 2 life.
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Cards similar to Parasitic Impetus expected a card that isn't here?
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Nettling Curse87%
$0.09↓#27316↓0.1320.3 years↑
"Whenever enchanted creature attacks or blocks, its controller loses 3 life."
+1 more matching line
Psychic Impetus85%
$0.10↓#7092↓0.40↑6.4 years
"Enchanted creature gets +2/+2 and is goaded."
+1 more matching line
Revenge of Ravens84%
$0.30↑#28390.32↑6.9 years
"Whenever a creature attacks you or a planeswalker you control, that creature's controller loses 1 life and you gain 1 life."
Trespasser's Curse84%
$0.40↑#5150↓0.249.4 years↑
"Whenever a creature enchanted player controls enters, that player loses 1 life and you gain 1 life."
Archnemesis83%
$0.31↑#12453↓0.00↓0.2 years↓
"Whenever you attack enchanted player, that player loses 2 life. You draw a card and gain 2 life."
Sinister Possession83%
$0.09↓#18361↓0.00↓13.3 years↑
"Whenever enchanted creature attacks or blocks, its controller loses 2 life."
Contaminated Bond83%
$0.10↓#19718↓0.1222.9 years↑
"Whenever enchanted creature attacks or blocks, its controller loses 3 life."
+1 more matching line
Campaign of Vengeance82%
$0.25↑#12565↓0.32↑10.1 years↑
"Whenever a creature you control attacks, defending player loses 1 life and you gain 1 life."
Acquired Mutation81%
$0.30↑#9883↓0.252.5 years↓
"Enchanted creature gets +2/+2 and is goaded."
+1 more matching line
Shiny Impetus81%
$0.13#1382↑0.246.4 years
"Enchanted creature gets +2/+2 and is goaded."
+2 more matching lines
Soul Bleed80%
$0.06↓#27550↓0.2017.1 years↑
"At the beginning of the upkeep of enchanted creature's controller, that player loses 1 life."
+1 more matching line
Martial Impetus80%
$0.11↓#3778↓0.156.4 years
"Enchanted creature gets +1/+1 and is goaded."
+1 more matching line
Coercive Impetus79%
$0.33↑#7325↓0.00↓0.4 years↓
"Enchanted creature gets +1/+1 and is goaded."
+1 more matching line
Gift of the Woods79%
$0.08↓#26749↓0.50↑30.2 years↑
"Enchant creature"
Brand of Ill Omen78%
$1.59↑#26273↓0.93↑31.3 years↑
"Enchant creature"
Incriminating Impetus78%
$0.43↑#14786↓0.07↓2.5 years↓
"Enchanted creature gets +2/+2 and is goaded."
+1 more matching line
Kardur, Doomscourge78%
$0.41↑#972↑0.57↑5.6 years
"Whenever an attacking creature dies, each opponent loses 1 life and you gain 1 life."
Agate-Blade Assassin78%
$0.15↑#8985↓0.00↓2.1 years↓
"Whenever this creature attacks, defending player loses 1 life and you gain 1 life."
Inevitable End78%
$0.17↑#19406↓0.62↑6.6 years
"Enchant creature"
MacCready, Lamplight Mayor77%
$5.90↑#3701↓0.41↑2.5 years↓
"Whenever a creature with power 4 or greater attacks you, its controller loses 2 life and you gain 2 life."