Choking Vines 

Instant
Cast this spell only during the declare blockers step.
X target attacking creatures become blocked. Choking Vines deals 1 damage to each of those creatures. (This spell works on creatures that can't be blocked.)
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Dazzling Beauty 100%
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"Cast this spell only during the declare blockers step."
+1 more matching line
Illusionist's Gambit 95%
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"Cast this spell only during the declare blockers step on an opponent's turn."
Curtain of Light 88%
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"Cast this spell only during combat after blockers are declared."
+1 more matching line
Melee 87%
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"Cast this spell only during combat on your turn before blockers are declared."
Winter's Chill 86%
$1.73#17322
"Cast this spell only during combat before blockers are declared."
+1 more matching line