If you do play against a deck with Liliana of the Veil you still have a lot of play against it, such as an end step Polymorph with Quicken or Teferi, Time Raveler, or just having some extra Dwarves or fetchlands available after you put Emrakul, the Aeons Torn into play
Players can cast spells after Elder Gargaroth's triggered ability has resolved but before blockers are declared (if it's attacking) or before combat damage is dealt (if it's blocking)
Klefki's attack is also useful, as it might only do 10 damage, but it also removes tools that are attached to the opponent's Pokmon
The See more button is for visual users only to expose content incrementally that is already available to you Details Condition Open Box (never used) Features Base set, Sealed packs
The catch here is that Treasure Guardian, Protector of the Cave has an ability - called Who Disturbs My Slumber
Best starting point: A smaller modern set like Paldean Fates or Pokemon 151