The focus is not just on a single card, but on building a complete and up-to-date understanding of the Saga mechanic as a whole
Ulvenwald Mysteries can be part of a dedicated Clue plan, giving us a free 1/1 token for every Clue cracked, in addition to providing us with a plethora of Clues over time (since many of our creatures are going to give us Clues unless they die, and if they die, then the Ulvenwald Mysteries will give us Clues as to what happened)
Another thing to note is that none of these decks are very good against unfair combos or Gotcha
(Exile cards from the top of your library until you exile a nonland card with that mana value or less
(6/16/2023) If you don't control an Army, the Orc Army token you create enters the battlefield as a 0/0 creature before receiving counters
Be forewarned that older codes may be for a sealed event, so if MTGA is not running that format anymore, you may not get anything