It's a separate item given to local games stores to hand out to customers/players
This might be the direction to take Bant Spirits in Historic
Each Secret Lair could focus on a particular game or theme for example, one might feature Final Fantasy XIIIs cast (Lightning, et al.), another could highlight Final Fantasy XVs heroes , and perhaps a third could be a fun roundup of iconic Chocobos, Moogles, or Cids from across the series (the possibilities are endless, but the speculation of a 15 different Cids Secret Lair has already made rounds in the community in jest!)
"Or less." If you control just it, then you cannot drop a lesser drop, just a three-drop
Sometimes, all you really want is to toss a whole bunch of cards straight from your opponents hand into the discard pile
That lifelink clause though