Mystical Tether 

Enchantment
You may cast this spell as though it had flash if you pay {2} more to cast it.
When this enchantment enters, exile target artifact or creature an opponent controls until this enchantment leaves the battlefield.
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Cards that do something similar expected a card that isn't here?
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Static Snare 100%
$0.14#16022
"When this enchantment enters, exile target artifact or creature an opponent controls until this enchantment leaves the battlefield."
+1 more matching line
Thopter Arrest 100%
$0.18#23199
"When this enchantment enters, exile target artifact or creature an opponent controls until this enchantment leaves the battlefield."
Trapped in the Screen 89%
$0.16#8847
"When this enchantment enters, exile target artifact, creature, or enchantment an opponent controls until this enchantment leaves the battlefield."
Dusk Rose Reliquary 80%
$0.22#9337
"When this artifact enters, exile target artifact or creature an opponent controls until this artifact leaves the battlefield."
Breaking Wave 100%
$0.70#21927
"You may cast this spell as though it had flash if you pay {2} more to cast it."
Rout 100%
$0.41#7784
"You may cast this spell as though it had flash if you pay {2} more to cast it."
Harbinger of the Tides 100%
$0.18#11336
"You may cast this spell as though it had flash if you pay {2} more to cast it."
+1 more matching line
Saproling Symbiosis 100%
$1.91#5333
"You may cast this spell as though it had flash if you pay {2} more to cast it."
Oakshade Stalker // Moonlit Ambusher 100%
$0.22#22674
"You may cast this spell as though it had flash if you pay {2} more to cast it."
Asinine Antics 100%
$0.83#7715
"You may cast this spell as though it had flash if you pay {2} more to cast it."
Ghitu Fire 100%
$0.37#22230
"You may cast this spell as though it had flash if you pay {2} more to cast it."
Twilight's Call 100%
$0.71#13913
"You may cast this spell as though it had flash if you pay {2} more to cast it."
Ward of Lights 91%
$0.25#21777
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."
Relic Ward 91%
$0.14#27571
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."
Soar 91%
$0.08#30872
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."
Grave Servitude 91%
$0.12#29813
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."
Necromancy 91%
$21.03#993
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."
Parapet 91%
$0.09#25749
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."
Mystic Veil 91%
$0.14#22226
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."