Recently, the introduction of M14 has modified some of the MTG Rules. Don’t worry! These changes have no impact upon QL Magic, so the use of Legendary cards and the “Legend Rule” remain the same:
420.5e: If two or more Legends or legendary permanents with the same name are in play, all except the one that has been a Legend or legendary permanent with that name the longest are put into their owners’ graveyards. This is called “the Legend rule.”
In the event of a tie, each Legend or legendary permanent with the same name is put into its owner’s graveyard. (If two permanents have the same name but only one is a Legend or is legendary, this rule doesn’t apply.)