MTG Keyword Rules — Comprehensive Rules Glossary

Certain spells and abilities have the text “the Ring tempts you.” Each time the Ring tempts you, choose a creature you control. That creature becomes your Ring-bearer until another creature becomes your Ring-bearer or another player gains control of it.

Ring-bearer is a designation a permanent can have. Being a Ring-bearer is not a copiable value.

If a player doesn’t have an emblem named The Ring at the time the Ring tempts them, they get an emblem named The Ring before choosing a creature to be their Ring-bearer. The Ring has “Your Ring-bearer is legendary and can’t be blocked by creatures with greater power.” As long as the Ring has tempted that player two or more times, it has “Whenever your Ring-bearer attacks, draw a card, then discard a card.” As long as the Ring has tempted that player three or more times, it has “Whenever your Ring-bearer becomes blocked by a creature, the blocking creature’s controller sacrifices it at end of combat.” As long as the Ring has tempted that player four or more times, it has “Whenever your Ring-bearer deals combat damage to a player, each opponent loses 3 life.”

Some abilities trigger “Whenever the Ring tempts you.” The Ring tempts a player whenever they complete the actions in 701.54a, even if some or all of those actions were impossible.

Some abilities check to see if a creature “is your Ring-bearer.” For the purposes of those abilities, that condition is true if that creature is on the battlefield under your control and has the Ring-bearer designation.