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
Play boosters contain 14 cards with a set distribution of common, uncommon, and rare/mythic cards, along with land and wildcards
Etali, Primal Storm It requires some protection and building around, but if you manage to attack with Etali, Primal Storm, you can easily outvalue your opponents quickly
Lumiere is really only playable in a ramp list and even then you can probably find something better to spend 7 ink on
I also like this alongside red Commanders with menace like Syr Gwyn, Hero of Ashvale or Greven, Predator Captain
If you reveal a song card with cost nine or less, you can play it for free