The Street Fighter Secret Lair is by far one of the most flavorful collaborations released so far, being incredibly faithful to the source material with its implementation
Locations are a major core mechanic of the game introduced in Into the Inklands, but they arent included in Gateway
It sees nowadays mostly play against Hammer and artifact strategies, Rhino or Construct tokens and also helps against the powerful one drops like DRC, Ragavan and Deaths Shadow
Merfolk saw an excellent showing in MTGs first trip to Ixalan, and that lucky streak is set to continue in The Lost Caverns.
That naturally makes it a more family-friendly entry in the card game space, and with a comprehensive starter set like Gateway, I really hope it keeps that focus
The moral here is that when you get to play your spells, they are so powerful that its worth mulliganing aggressively to make sure you can play them on time