Pitfall Trap {2}{W}
Instant — Trap
If exactly one creature is attacking, you may pay {W} rather than pay this spell's mana cost.
Destroy target attacking creature without flying.
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Cards that do something similar expected a card that isn't here?
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Militia's Pride 84%
$6.66#16726
"Whenever a nontoken creature you control attacks, you may pay {W}. If you do, create a 1/1 white Kithkin Soldier creature token that's tapped and attacking."