
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.)
Enduring Tenacity has 6 printings, first in Duskmourn: House of Horror (2024). EDHREC ranks it #791 among Commander cards. It appears most in Y'shtola, Night's Blessed decks (16,366 on EDHREC). It has 7 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.