Youll have plenty of mana to bounce Lumra with Otawara, recast Lumra, bring all your lands back once again, bounce Otawara with Arid Archway, and repeat this process
In case you didnt know, theres a lot of serious Final Fantasy collectors out there, and these folks have really come out in support of the cards/art that depict their favorite characters or scenes
When two cards are exiled and melded, they each leave the battlefield, then return together as one new untapped object with no relation to either of the objects that left the battlefield
At three mana, Nissa, Resurgent Animist is capable of producing a lot of mana at once
The latter distributes these cards randomly, however, so buying the Scene Boxes is more reliable if you want a specific card