Whenever you gain life, target opponent loses that much life. When Enduring Tenacity dies, if it was a creature, return it to the battlefield under its owner's control. It's an enchantment. (It's not a creature.)
Near Mint - $7.70
Lightly Played - $6.90
Played - $5.40
Heavily Played - $4.60
Damaged - $3.90
Near Mint Non-English - $7.70
Lightly Played Non-English - $6.90
Played Non-English - $5.40
Heavily Played Non-English - $4.60
Damaged Non-English - $3.90
Foil Prices
Near Mint Foil - $8.70
Lightly Played Foil - $7.80
Played Foil - $6.10
Heavily Played Foil - $5.20
Damaged Foil - $4.40
Near Mint Foil Non-English - $8.70
Lightly Played Foil Non-English - $7.80
Played Foil Non-English - $6.10
Heavily Played Foil Non-English - $5.20
Damaged Foil Non-English - $4.40