Call of the Ring

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.

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

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.