captain america mtg commander deck Avengers Assemble” Full Reveal + Upgrade | Marvel Super Heroes | The Command Zone 746 | attach up to one target Equipment you control to Captain America. MTG Marvel Super Heroes Avengers

Something along the line of a scannable code on cards to verify authenticity would get the job done, but implementing the program would be costly, and it wouldn't help with all the cards that are currently in print (barring some sort of mass-exchange program, which would be even more prohibitively expensive)

Emerald cards like the Mad Hatter Gracious Host Quest for three lore and need to be dealt with but if your opponent Challenges him, you get to draw a card

BEAR UMBRA Seedborn Muse is a removal magnet, and it hogs the chess clock

Lightning, Army of One Lightning, Army of One is another card that creates massive, scaling value, but doesnt really do that on her own