Thwart 
Instant
$0.80 #15428 0.50 26.9 years
You may return three Islands you control to their owner's hand rather than pay this spell's mana cost.
Counter target spell.
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Daze98%
$1.11↑#3055↑0.5126.6 years
"You may return an Island you control to its owner's hand rather than pay this spell's mana cost."
+1 more matching line
Gush96%
$2.33↑#6094↑0.65↑26.9 years
"You may return two Islands you control to their owner's hand rather than pay this spell's mana cost."
Ensnare95%
$0.67↓#137240.35↓26.6 years
"You may return two Islands you control to their owner's hand rather than pay this spell's mana cost."
Tidal Bore94%
$0.36↓#141400.11↓26.9 years
"You may return an Island you control to its owner's hand rather than pay this spell's mana cost."
Flare of Denial88%
$3.54↑#1426↑1.01↑2.2 years↓
"Counter target spell."
Foil85%
$1.67↑#4267↑0.86↑26.3 years
"You may discard an Island card and another card rather than pay this spell's mana cost."
+1 more matching line
Force of Will83%
$58.18↑#192↑2.01↑30.2 years↑
"Counter target spell."
Pact of Negation82%
$17.65↑#364↑1.46↑19.3 years↓
"Counter target spell."
Disrupting Shoal80%
$15.34↑#9978↑0.5721.6 years↓
"Counter target spell if its mana value is X."
Mental Misstep76%
$5.90↑#462↑0.79↑15.3 years↓
"Counter target spell with mana value 1."
Not of This World76%
$5.78↑#2467↑0.5016.4 years↓
"Counter target spell or ability that targets a permanent you control."
Fathom Seer76%
$0.05↓#19972↓0.05↓19.9 years↓
"Morph—Return two Islands you control to their owner's hand. You may cast this card face down as a 2/2 creature for 
. Turn it face up any time for its morph cost."
. Turn it face up any time for its morph cost."
Fierce Guardianship75%
$59.12↑#82↑2.30↑6.4 years↓
"Counter target noncreature spell."
Deprive74%
$0.39↓#9756↑0.19↓16.4 years↓
"As an additional cost to cast this spell, return a land you control to its owner's hand."
+1 more matching line
Flooded Shoreline74%
$2.23↑#20919↓0.07↓29.6 years↑
", Return two Islands you control to their owner's hand: Return target creature to its owner's hand."
, Return two Islands you control to their owner's hand: Return target creature to its owner's hand."
Cancel73%
$0.06↓#2057↑0.29↓19.9 years↓
"Counter target spell."
Out of Air72%
$0.20↓#138100.532.8 years↓
"Counter target spell."
Ertai's Scorn72%
$0.27↓#9323↑0.17↓4.0 years↓
"Counter target spell."
Out of Bounds71%
$0.22↓#183010.448.2 years↓
"Counter target spell."
Waterspout Djinn70%
$0.10↓#31371↓0.00↓29.6 years↑
"At the beginning of your upkeep, sacrifice this creature unless you return an untapped Island you control to its owner's hand."