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 Foil - £4.80
Lightly Played Foil - £4.10
Moderately Played Foil - £3.40
Heavily Played Foil - £2.40
Damaged Foil - £1.50
Near Mint Foil Non English - £4.80
Lightly Played Foil Non English - £4.10
Moderately Played Foil Non English - £3.40
Heavily Played Foil Non English - £2.40
Damaged Foil Non English - £1.50