Creatures, artifacts, even permanents in general arent safe when this deck hits the table
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
That might not sound too great, but it essentially puts your opponent on a six-turn timer to get rid of Trevenant BREAK, otherwise all of their Pokemon will (probably) be dead after taking 180 damage
For four Energy, it can deal 100 damage and heal 30 HP from itself
I played it against the Duelist Challenges until Dartz
That being said, it's still an accepted and frankly welcomed extreme