The first deck you should build off the bones of your tutorial deck is this one based on the “On Reveal” mechanic, which means that a card activates its power when it’s turned over.
The deck shown above is a great first build of that archetype, but it still offers plenty of room for customization based on what you unlock. For instance, Rocket Raccoon and Gamora require you to think ahead and predict what your opponent will do. You can also put in Star-Lord instead (or Groot or Mantis) for relatively similar results.
Elektra and Enchantress, meanwhile, have abilities that you’ll find plenty of use for. Elektra can kill an opposing 1 cost card (possibly taking out an empowered Ant-Man or a mobile Nightcrawler), and Enchantress (a powerful counter) will stop an Ongoing-themed deck dead in its lane.
However, the star of this show is the Odin/Tiger combo. Play the White Tiger on Turn 5 if it’s in your hand, then play Odin as your finale. Granted, you will need to pay attention to locations to make the most out of that combo. Playing this combo on Bar Sinister, which creates duplicates, is tough to top. Kamar-Taj will also empower On Reveal plays. On the other hand, watch out for Knowhere (which will actually lock down this deck’s abilities).