Memory Erosion 
Enchantment
$7.20 #3813 0.44 18.0 years
Whenever an opponent casts a spell, that player mills two cards.
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Cards similar to Memory Erosion expected a card that isn't here?
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Mogg Sentry78%
$0.32↓#22626↓0.12↓25.7 years↑
"Whenever an opponent casts a spell, this creature gets +2/+2 until end of turn."
Straw Golem76%
$0.15↓#30399↓0.00↓29.4 years↑
"When an opponent casts a creature spell, sacrifice this creature."
Sphinx Mindbreaker75%
$3.42↓#15193↓0.31↓6.7 years↓
"When this creature enters, each opponent mills ten cards."
Dragonlair Spider74%
$0.49↓#8367↓0.31↓14.4 years↓
"Whenever an opponent casts a spell, create a 1/1 green Insect creature token."
Nimana Skydancer74%
$0.08↓#23251↓0.05↓6.1 years↓
"When this creature enters, target opponent mills two cards."
Nemesis of Reason72%
$3.08↓#4630↓0.68↑17.5 years
"Whenever this creature attacks, defending player mills ten cards."
Shriekgeist72%
$0.10↓#23923↓0.00↓14.7 years↓
"Whenever this creature deals combat damage to a player, that player mills two cards."
Aether Sting71%
$0.43↓#15402↓0.00↓27.4 years↑
"Whenever an opponent casts a creature spell, this enchantment deals 1 damage to that player."
Psychic Corrosion70%
$4.76↓#1799↑0.68↑8.3 years↓
"Whenever you draw a card, each opponent mills two cards."
Mind Sculpt70%
$0.24↓#11836↓0.16↓14.3 years↓
"Target opponent mills seven cards."
Mind's Dilation70%
$0.32↓#2717↑0.74↑10.2 years↓
"Whenever an opponent casts their first spell each turn, that player exiles the top card of their library. If it's a nonland card, you may cast it without paying its mana cost."