Are you thinking of starting a Magic: The Gathering card collection
Also, Foundations just brought out a few new cards which help tie dragons and spellslinger, which has given me the urge to rebuild Eris as a full-on dragon deck
You can easily build a Dinosaur deck by pairing any two colors, but there is little reason not to do three-color Dinosaur builds
Although this creature lets us tutor out non-green disruptive creatures like Thalia or Prelate , I think its too slow against the combo decks you want them against for that to be a reason to play it
If you choose to keep more then one card from the library, pay four life for each extra card you keep
Final Thoughts While Universes Beyond: Assassin's Creed only has 100 cards, 20 of which are reprints, I think this will inject some fun new cards into Commander