At the time of Antiquities , the rules of protection were still up in the air (Revised was the set that really established the basic fundamentals of modern day protection), so the Antiquities design team (Skaff Elias, Jim Lin, Joel Mick, Chris Page and Dave Pettey) decided to make cards that had an ability like protection from artifacts
But Wizards of the Coast has now announced a sizeable batch of seven new Secret Lairs, each one a collection of cards themed around its TTRPG Dungeons and Dragons
See Mini Games rules above
Additional infinite mana combos would also make sense
Its best with cards that have valuable activated abilities or attack triggers you want to trigger immediately, such as Rowan, Scion of War, or Alena, Kessig Trapper
Tifa Lockhart 7 Printings and their Prices Track Tifa Lockhart Prices Free collection tools for Magic: the Gathering