Leonin Bladetrap

You may play Leonin Bladetrap any time you could play an instant.
{2}, Sacrifice Leonin Bladetrap: Leonin Bladetrap deals 2 damage to each attacking creature without flying.

Flash (You may cast this spell any time you could cast an instant.)
{2}, Sacrifice this artifact: It deals 2 damage to each attacking creature without flying.

Commander Anthology

Flash (You may cast this spell any time you could cast an instant.)
{2}, Sacrifice Leonin Bladetrap: Leonin Bladetrap deals 2 damage to each attacking creature without flying.

Commander 2013

Flash (You may cast this spell any time you could cast an instant.){2}, Sacrifice Leonin Bladetrap: Leonin Bladetrap deals 2 damage to each attacking creature without flying.