Four total players can join in the battle if two have pre-made decks of their own, using a higher-difficulty Battleground card
On the one hand, people in support of the Reserved List argue that the Reserved List ensures that older collections retain their value
It does give that player a bunch of 1/1 Elf tokens, but that likely wont affect you too much
All of the Merlin cards give an ability when returned to hand, like the Merlin Crab which gives another character +3 strength when challenging, when they are played, and when they leave play (which can be in the same turn for a super boost), and Madam Min returns cards to hand when played
Completing the Quest there earns you a Violet Parr Learning New Powers Seasonal Promo card
each time Skirk Fire Marshal goes off