The nature of CCGs means that the cards in the packs are entirely random across the set rarity of each pack, which for each Lorcana booster pack is 6 common cards, 3 uncommon cards, 2 rare, super rare, or legendary cards, and 1 foil card (random rarity level)
It'll set up your mana perfectly and transform into a saga that's full of valuable chapters for your dinosaurs
Lay Down Arms is more restrictive than its counterparts
I do appreciate how broad it is, but hopefully you can just play Sephiroth's Intervention or Fate of the Sun-Cryst instead
White and/or blue are musts for color identity, with access to both colors being preferred, and the lower the mana cost of your commander, the better, as it will be easier to cast