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 - $5.10
Lightly Played Foil - $4.80
Moderately Played Foil - $4.60
Heavily Played Foil - $4.10
Damaged Foil - $3.30
NM-Mint Foil Non English - $5.10
Lightly Played Foil Non English - $4.80
Moderately Played Foil Non English - $4.60
Heavily Played Foil Non English - $4.10
Damaged Foil Non English - $3.30