Call of the Ring

Each time the Ring tempts you, you must choose a creature if you control one.

As the Ring tempts you, you get an emblem named The Ring if you don't have one. Then your emblem gains its next ability and you choose a creature you control to become (or remain) your Ring-bearer.

Call of the Ring's last ability will trigger any time you choose a creature as your Ring-bearer, even if that creature was already your Ring-bearer.

Each player can have only one emblem named The Ring and only one Ring-bearer at a time.

If the creature you choose as your Ring-bearer was already your Ring-bearer, that still counts as choosing that creature as your Ring-bearer for the purpose of abilities that trigger "whenever you choose a creature as your Ring-bearer" or abilities that care about which creature was chosen as your Ring-bearer.