Marvel Super Heroes

Legendary Creature — Human Hero

Unbreakable Skin — Whenever Luke Cage attacks alone, he gets +2/+0 and gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy him.)

Luke Cage, Power Man

Marvel Super Heroes Commander

Legendary Creature — Human Warrior Hero

When Okoye enters, you become the monarch.
At the beginning of combat on your turn, put a +1/+1 counter on target creature. Whenever that creature attacks the monarch this turn, it gains double strike and trample until end of turn.

Okoye, Mighty and Adored

Sorcery

Harmonize

Soldier

Whenever another nontoken Hero you control enters, choose one —
• Create a 1/1 white Soldier creature token.
• Creatures you control get +1/+1 until end of turn.

Black Panther, Vanguard

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
As long as Patriot is equipped, other creatures you control get +1/+0.

Patriot, Young Avenger

As an additional cost to cast this spell, sacrifice a creature or discard a card.
Destroy target creature. Minion Missile deals 2 damage to that creature's controller.

Minion Missile

Legendary Creature — Mutant Hero

{T}: Until end of turn, target creature can't be blocked by creatures with power 2 or less and/or Walls.

Doorman

Origami-Fu — {2}{G}: Switch Flatman's power and toughness until end of turn.

Flatman

Creature — Human Detective

This creature enters with a +1/+1 counter on it.
When this creature leaves the battlefield, put its +1/+1 counters on target creature you control.

Selfless Police Captain

Flying
When Starling enters, another target creature you control gains flying until end of turn.

Starling, Aerial Ally

Card

Spider-Man, Brooklyn Visionary

Marvel's Spider-Man Art Series

Marvel's Spider-Man

Enchantment — Aura

Enchant creature
Enchanted creature is a Citizen with base power and toughness 1/1. It has defender and loses all other abilities. (It also loses all other creature types.)

Spider-Man No More

Legendary Creature — Spider Human Hero

Web-slinging {2}{G} (You may cast this spell for {2}{G} if you also return a tapped creature you control to its owner's hand.)
When Spider-Man enters, search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Murders at Karlov Manor Commander

Put a double strike counter on target creature, then goad each creature that had a double strike counter put on it this way. (Until your next turn, those creatures attack each combat if able and attack a player other than you if able.)
Overload {4}{R}{R}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")