As an additional cost to cast this spell, discard a card or sacrifice a permanent.
Fathomless descent — Souls of the Lost's power is equal to the number of permanent cards in your graveyard and its toughness is equal to that number plus 1.
NM-Mint Foil - $2.40
Lightly Played Foil - $2.30
Moderately Played Foil - $2.20
Heavily Played Foil - $2.00
Damaged Foil - $1.60
NM-Mint Foil Non English - $2.40
Lightly Played Foil Non English - $2.30
Moderately Played Foil Non English - $2.20
Heavily Played Foil Non English - $2.00
Damaged Foil Non English - $1.60