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.)
NM-Mint Foil - $7.40
Lightly Played Foil - $6.70
Moderately Played Foil - $6.00
Heavily Played Foil - $5.20
Damaged Foil - $3.70
NM-Mint Foil Non English - $7.40
Lightly Played Foil Non English - $6.70
Moderately Played Foil Non English - $6.00
Heavily Played Foil Non English - $5.20
Damaged Foil Non English - $3.70