Star-Lord - Mutant Milano

Deck Concept:

With Star-Lord being able to treat all allies played as Guardians we can use this to allow him to play both the Guardian and X-Men only attachments to his allies.

Star-Lord himself can then be used to cheat out cards with his hero ability and flex onto either thwarting problematic side schemes/main or dealing additional damage with Element Gun triggers or Mean Swing events.

Upgrades Attack Training / Energy Spear / Enraged / Sidearm

Key components to increasing the attack stats on allies. With Star-Lord treating all allies as Guardians he can play both the Energy Spear and Attack Training on X-Men allies.

Allies 8 Allies total with all optional allies taken as X-Men to maximize on the potential to get an X-Ally on the board and start applying the upgrade cards.

Angel - Solid Cost to damage stats. Not a priority to play if other allies are available but better than other options like Professor X or Storm at deck construction.

Colossus - A good target to apply upgrades given his high damage value. Coming in with tough can be a saving grace against hard hitting villains or minions.

Dust - An incredible option to play out and upgrade on scenarios with high levels of minions coming out of the villain deck (Ultron, Drang ...) You can easily get a 5 damage hit on every minion on the board instantly KO'ing the vast majority of minions on the board including many nemesis minions.

Magik - An ally with good attack stats but also the value of at time being able to shuffle an already engaged minion with potentially problematic keywords on back into the deck. More situational but often still provides value.

Nova - The only non-avoidable and non X-Men ally with it coming as part of Star-Lord's deck. Not a priority but still one worth playing if defeating a non-elite minion is situationally powerful much like Magik above.

Psylocke - Not the highest priority given the cost but if additional thwart potential is needed or in-built confusion ability to prevent villain scheming if you need to flip to alter ego.

Sunfire - A great to choice to aid against removing a wide array of villain attachments at a fairly low cost for doing so whilst getting out at worst a blocker for an attack.

Wolverine - This is the ideal target for you to play upgrades upon as with the innate healing each round and Wolverine's piercing attacks, Wolverine should be the highest priority to play on the board and begin upgrading.

Events Use a combination of First Aid and Game Time to keep your now upgraded allies in the fight with the dealing consistent damage each turn. Mean Swing can then be used if you are using Star-Lord and can easily be triggered due to the likelihood of having used Star-Lord's "What Could Go Wrong?" to play a copy of Element Gun on turn 1.

Supports Boot Camp - used to give all allies extra +1 ATK so complements the upgrades on allies to further beef allies stats

Knowhere/Utopia - Given high propensity to play both Guardian and X-Men allies you should be able to trigger these abilities regularly, especially Knowhere.