You can find rulings and FAQ changes here
Core Set (November 1, 2019)
While any minions with this keyword are engaged with a player, that player cannot attack villains without this keyword.
If an ally is used to defend against an attack with overkill, any excess damage from the attack (damage beyond the ally’s remaining hit points) is dealt to the identity of the player controlling the ally, if able. If an attack with overkill defeats a minion, excess damage from the attack (damage beyond the minion’s remaining hit points) is dealt to the villain.
While a player is resolving a card with this keyword, that player cannot consult other players, and other players cannot play cards or trigger abilities.
After this enemy engages a player, it immediately attacks that player if they are in hero form.
A player cannot control more than two restricted cards in play at a given time. If a player ever controls more than two restricted cards in play, they must immediately choose and discard from play restricted cards they control until they have only two
After this character is attacked, deal X damage to the attacker. The character must survive the attack to deal this damage. (X is the value next to the retaliate keyword.)
After an encounter card with this keyword is revealed, the player resolving the card reveals an additional encounter card. Complete the process of resolving the original card before revealing the additional card.
When this character enters play, place a tough status card on it.
Uses (X “type”)
When a card with this keyword enters play, place X all-purpose counters from the token pool on the card. The word following the value establishes and identifies the type of uses the card holds.
Each card with this keyword also has an ability that references the type of use established by the keyword as part of the cost. When such an ability spends a use, a counter of that type must be removed from the card.
After a card with uses spends its final use (and the effect resolves), discard the card.
The Rise of Red Skull (September 4, 2020)
When a card with the Incite X keyword is revealed, place X threat on the main scheme.
A card with the permanent keyword cannot leave play.
Changed in Mutant Genesis (September 30, 2022)
A card with permanent cannot be defeated, leave play, or have any part of its text box blanked. This rule does not apply to cards within the same set as the card with permanent (hero set, scenario set, or modular set).
An attack with the piercing keyword discards any tough status cards from the target of the attack before dealing damage.
An attack with the ranged keyword ignores the retaliate keyword.
A card with the setup keyword beings the game in play.
The Once and Future Kang (October 2, 2020)
When a minion with the villainous keyword activates, give it a facedown boost card from the top of the encounter deck. When you resolve that minion’s activation, turn the boost card faceup and apply its boost icons to the minion’s stats for this activation. If the boost card has a boost ability, resolve its effects. Discard the boost card after the activation.
Ant-Man (November 6, 2020)
The team-up keyword names two characters. To include a card with the team-up keyword in your deck, your chosen identity must match one of the two named characters. Additionally, a card with the team-up keyword cannot be played unless both of the named characters (hero and ally) are in play.
Changed in Sinister Motives (November 6, 2020)
The team-up keyword names two characters. To include a card with the team-up keyword in your deck, your chosen identity must match one of the named characters. Additionally, a card with the team-up keyword cannot be played unless both of the named characters (identity or ally) are in play.
Galaxy’s Most Wanted (April 2, 2021)
The amplify icon increases the number of boost icons on boost cards. When a boost card is turned faceup during enemy activation, add one additional boost icon to that card for each amplify icon in play.
When a card with the hinder X keyword is revealed, place [x] threat on that card.
While any minions with the patrol keyword are engaged with a player, that player cannot thwart the main scheme.
A character that has the stalwart keyword cannot be stunned or confused.
When a card with the victory X keyword is defeated, place it in the victory display instead of its owner’s discard pile.
The victory display is an out-of-play game area shared by all players. Cards in the victory display follow the standard rules for out-of-play cards.
War Machine (November 12, 2021)
Alliance is a new keyword that appears on some player cards in this pack. When a player declares their intention to play an alliance card, any player may help pay the costs for that card.
The Hood (November 26, 2021)
Steady characters require two status cards of the same type to be stunned or confused.
Sinister Motives (April 7, 2022)
A card with the requirement keyword cannot be played unless each resource of the specified type is spent while paying for that card’s cost.
Cyclops (September 30, 2022)
A card with temporary must be discarded from play at the end of the round.
Mutant Genesis (September 30, 2022)
After a minion with teamwork enters play and engages a player, if there is at least one other minion that shares the specified trait in play, each minion that shares the teamwork keyword with the same specified trait activates against the player it is engaged with.
NeXt Evolution (Fall, 2023)
Basic thwarts against this scheme use ATK instead of THW. [reminder text – TBD update for the exact rulebook text.]