After a player finishes their turn, the person to their left goes next
Everything in the lair is themed around tomb raiding, and lots of it is valuable: Search for Azcanta, Anger of the Gods, Bow of Nylea, Shadowspear, Academy Ruins Through the Wormhole - The cards in this Secret Lair aren't particularly valuable, but the contents - Lightning Greaves, Arcane Signet, Sol Ring, Thought Vessel, and Command Tower - are a complete playset of Commander essentials, in a beautiful and consistent art style by Dani Pendergast
It costs a lot of mana but lets you storm off in the late game if you have Lessons in your graveyard along with a cost reducer like Goblin Electromancer
If money is no question and youre looking for higher budget cards, swap out the Negate for Fierce Guardianship, Aphetto Runecaster for Rhystic Study, and Delete for Blood Money or Toxic Deluge