Does Leyline of Singularity work with Reki, the History of Kamigawa?
Leyline of Singularity says:
If Leyline of Singularity is in your opening hand, you may begin the game with it on the battlefield.
All nonland permanents are legendary.
Reki, the History of Kamigawa says:
Whenever you cast a legendary spell, draw a card.