Wizards seems not to want to include these in Secret Lairs, and they may want to keep them to hype up booster boxes to sell packs
At quick glance, the deck only has eight Clue cards (four copies each of Novice Inspector and Thraben Inspector) and no explicit Clue synergies but you can get a lot of mileage from them, both in the early and the late game
It goes infinite quite easily, usually in conjunction with Rosie Cotton of South Lane, Ivy Lane Denizen, or one of numerous other cards that can put +1/+1 counters on the oak when the Squirrel tokens enter the battlefield
In most cases, they will be copies of whatever that creature was copying
Instead, all damage dealt to you is dealt to Anti-Venom, which then turns it into +1/+1 counters
There is also a tab for Events, and it will show you all the available options for events currently running