Crucially, like cards with Adventures on them, you can only cast a spell from exile if it was exiled due to the warp ability - if the card was exiled in any other way, you cannot play the card later on
I just feel like what I have to say is a bit redundant
Based on the latest market prices tracked on TCG Stacked, a foil copy of Opening Ceremony is worth about $0.60 USD
Sail The Azurite Sea or Tipo Growing Son would be simpler, more proven ramp choices
Anrakyr the Traveller While there might be some combat tricks available in dropping an artifact from hand after Anrakyr attacks, getting cards from the graveyard will produce the most value
The high land count provides a good basis to summon them, supported by artifacts included in the deck or creature cards like Klauth or the Savage Ventmaw