Each Collector Booster contains: An opportunity to open a card from 1994's Legends set (found in 3% of Dominaria United Collector Boosters) 1 Traditional foil Booster Fun rare or mythic rare that could have extended-art, showcase stained-glass, borderless art, or Phyrexian-language treatments 2 Alternative-border rares or mythic rares that can be showcase stained-glass, borderless, Phyrexian-language, or foil-etched or non-foil versions of the rare Legends Retold cards 1 Extended-art rare or mythic rare 1 Traditional foil rare or mythic rare 1 Guaranteed textured foil in either uncommon, rare, or mythic rare 1 Uncommon non-foil or foil-etched Legends Retold card 1 Uncommon traditional foil showcase stained-glass card 1 Traditional foil full-art stained-glass basic land 2 Traditional foil uncommons 4 Traditional foil commons, unless one is replaced by a Lost Legends card Draft Boosters Dominaria United Draft Boosters are designed for that perfect Draft or Sealed play experience, but just like Set and Collector Boosters, every single Draft Booster in Dominaria United contains a legendary creature, perfect for defending the plane from a threat to the Multiverse

That doesn't mean that in a few years we'll all be playing cEDH, but it does mean that there is less room in most EDH games for cards that aren't as efficient or as powerful
Serialized Borderless Concept Eldrazi In addition to the non-foil and traditional foil borderless concept Eldrazi, there are double rainbow borderless serialized versions of the Eldrazi titans that can appear in Modern Horizons 3 Collector Boosters
Be sure you have at least a reason or two to spring for a fetch land, otherwise, it's worth it to save some money and leave the big spending for decks that need more from their land base
Tibalt, Cosmic Impostor creates an emblem that counts everything the planeswalker exiles, even if its been removed