Illusory Gains {3}{U}{U}
Enchantment — Aura
Enchant creature
You control enchanted creature.
Whenever a creature an opponent controls enters, attach this Aura to that creature.
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Cards that do something similar expected a card that isn't here?
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Prison Term 96%
$0.38#13035
"Whenever a creature an opponent controls enters, you may attach this Aura to that creature."
+1 more matching line
Shielded by Faith 82%
$0.34#3353
"Whenever a creature enters, you may attach this Aura to that creature."
+1 more matching line