Riis, Gone to Eons

{t}: Add {1} to your mana pool.

{3}: Surveil {x} times, where {x} is the number
of different Eliksni in your graveyard. If The Traveller is sent to the graveyard this way, exile it instead. You may play it for as long as it remains exiled.

If The Traveller was played from exile, untap Riis, Gone to Eons and transform it