While some like Consuming Aberration already can, this vastly improves cards like Hunted Horror
Cards like The Queen, Commanding Presence and Gaston, Intellectual Powerhouse are about as tricky as things get, but they simply do what they say on the card and get players used to the powerful (at least in my eyes) shift mechanic, which is a cost reduction method
Three damage might not seem like a lot, but it's enough to wipe out nearly every creature your opponent can present during the first three turns of the game
Seeing how quickly Solphim gets out of control, expect your opponents to paint an immediate crosshair on her head
Mulligans in Constructed Constructed is where you'll want to deviate from the "Two to Five Lands Strategy," because games are faster, decks are more powerful, and you're punished more quickly for keeping a sub-par opening hand
Likewise, you can run any of these penultimate bosses in a mono-colored deck