Mourner's Mire

If exactly one creature is attacking you, you may
pay {1}{b}{b} rather than pay this spell's mana
cost.
Baleful Bite — Deathtouch.
__________________________
It preys on grief, and hides itself in fresh grave dirt.
Once the Mourner's Mire senses something above it,
it ensnares the victim using its jaw-like limbs, and
wraps the prey in a toothy embrace.
Artwork/creature source:
https://www.youtube.com/watch?v=BraYqeJF9to