Parasitic Impetus 
Enchantment — Aura
$0.19 #2824 0.23 6.5 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↓#27638↓0.47↑20.5 years↑
"Whenever enchanted creature attacks or blocks, its controller loses 3 life."
+1 more matching line
Revenge of Ravens84%
$0.31↑#29260.187.0 years
"Whenever a creature attacks you or a planeswalker you control, that creature's controller loses 1 life and you gain 1 life."
Psychic Impetus84%
$0.15↓#7137↓0.306.5 years
"Enchanted creature gets +2/+2 and is goaded."
+2 more matching lines
Trespasser's Curse84%
$0.33↑#5175↓0.53↑9.5 years↑
"Whenever a creature enchanted player controls enters, that player loses 1 life and you gain 1 life."
Archnemesis83%
$0.36↑#11473↓0.290.3 years↓
"Whenever you attack enchanted player, that player loses 2 life. You draw a card and gain 2 life."
Sinister Possession83%
$0.08↓#18637↓0.1413.5 years↑
"Whenever enchanted creature attacks or blocks, its controller loses 2 life."
Contaminated Bond83%
$0.11↓#20001↓0.12↓23.0 years↑
"Whenever enchanted creature attacks or blocks, its controller loses 3 life."
+1 more matching line
Festering Wound82%
$0.29↑#22593↓0.2827.4 years↑
"Enchant creature"
Campaign of Vengeance82%
$0.26↑#12904↓0.00↓10.2 years↑
"Whenever a creature you control attacks, defending player loses 1 life and you gain 1 life."
Shiny Impetus81%
$0.13↓#1401↑0.216.5 years
"Enchanted creature gets +2/+2 and is goaded."
+2 more matching lines
Acquired Mutation81%
$0.30↑#10105↓0.212.6 years↓
"Enchanted creature gets +2/+2 and is goaded."
+1 more matching line
Martial Impetus80%
$0.13↓#3815↓0.326.5 years
"Enchanted creature gets +1/+1 and is goaded."
+2 more matching lines
Soul Bleed80%
$0.09↓#27940↓0.06↓17.3 years↑
"At the beginning of the upkeep of enchanted creature's controller, that player loses 1 life."
+1 more matching line
Coercive Impetus79%
$0.34↑#6718↓0.13↓0.5 years↓
"Enchanted creature gets +1/+1 and is goaded."
+1 more matching line
Brand of Ill Omen78%
$1.72↑#26502↓0.98↑31.4 years↑
"Enchant creature"
Incriminating Impetus78%
$0.44↑#14997↓0.06↓2.7 years↓
"Enchanted creature gets +2/+2 and is goaded."
+1 more matching line
Kardur, Doomscourge78%
$0.47↑#994↑0.60↑5.7 years
"Whenever an attacking creature dies, each opponent loses 1 life and you gain 1 life."
Agate-Blade Assassin78%
$0.21↑#9388↓0.00↓2.2 years↓
"Whenever this creature attacks, defending player loses 1 life and you gain 1 life."
Guise of Fire78%
$0.06↓#28735↓0.06↓14.5 years↑
"Enchant creature"
Morgul-Knife Wound78%
$0.20↑#14413↓0.183.3 years↓
"Enchant creature"