When Captain America enters, you may search your library for an Equipment card with mana value 3 or less, put it onto the battlefield, then shuffle.
Whenever Captain America attacks, for each Equipment attached to him, create a 1/1 white Soldier creature token.

Flying, vigilance
Battalion — Whenever Captain America and at least two other creatures attack, put a +1/+1 counter on each attacking creature. They gain indestructible until end of turn.

Lifelink
Whenever Captain America attacks, put a +1/+1 counter on another target creature you control. That creature gains indestructible until end of turn.

First strike
Captain America enters with a shield counter on him.
As long as Captain America has a shield counter on him, you and other Heroes you control have hexproof.

Flash
When Captain America enters, Soldiers and Heroes you control gain indestructible until end of turn.

Flying, first strike, ward
Whenever Captain America attacks, each other Hero you control gets +X/+X until end of turn, where X is Captain America's toughness.

At the beginning of your end step, create a 1/1 red Officer creature token for each dilemma you've faced this turn.
, : Exile the top five cards of your library. You may cast any number of spells with mana value less than or equal to the number of Officers you control from among those cards without paying their mana costs.

Double strike
Spells cast from among cards you drew this turn cost less to cast.
Spells cast from among cards your opponents drew this turn cost more to cast.

Other creatures you control get +1/+1.
Whenever you cast a creature or Spacecraft spell, create a 1/1 red Officer creature token.
Tap seven untapped Officers you control: Search your library for a Spacecraft card, put it onto the battlefield with seven charge counters on it, then shuffle.

Flash
Flying, lifelink
Power-up — : Put a +1/+1 counter and an indestructible counter on Captain Marvel.

Flying
Whenever Captain Marvel enters or attacks, exile up to one target creature. That creature's controller gains life equal to its power.
Whenever a creature other than Captain Marvel is exiled from the battlefield, you gain life equal to its power.

Flying, vigilance
Cosmic Awareness — As long as an opponent has cast a spell this turn, you may cast spells as though they had flash.

Vigilance
Other Soldier creatures you control get +1/+1 and have vigilance.
When this creature enters, create three 1/1 white Soldier creature tokens.

Create three 1/1 white Soldier creature tokens.

Target blocking creature gets +2/+2 until end of turn.
Draw a card.

Constellation — Whenever an enchantment you control enters, tap target creature an opponent controls.

Enchant creature you don't control
Enchanted creature can't attack.
Whenever an opponent casts a spell, if it has a single target, change the target to enchanted creature if able.

Level up

, Sacrifice a creature: Prevent the next 1 damage that would be dealt to any target this turn.

(Gain the next level as a sorcery to add its ability.)
Whenever one or more tokens you control enter, draw a card. This ability triggers only once each turn.
: Level 2
When this Class becomes level 2, create a token that's a copy of target token you control.
: Level 3
Creature tokens you control get +2/+2.

Enchant land you control
Enchanted land has ", : Create a 0/1 white Caribou creature token."
Sacrifice a Caribou token: You gain 1 life.

The next 1 damage that would be dealt to target creature this turn is dealt to another target creature instead.
Draw a card.

Flying
When this creature enters, draw a card at the beginning of the next turn's upkeep.

When this artifact enters and when you sacrifice it, create a 1/1 white Rabbit creature token and scry 1.
, , Sacrifice this artifact: You gain 3 life.

Flying
When this creature deals combat damage to a player who controls more lands than you, return it to its owner's hand. If you do, you may search your library for a Plains card, put it onto the battlefield tapped, then shuffle.

Enchant creature you control
When this Aura enters, create a 1/1 white Warrior creature token with vigilance.
Enchanted creature gets +1/+1 and has first strike.

When this creature enters and whenever you solve a Case, look at the top six cards of your library. You may reveal an enchantment card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.
You may spend mana as though it were mana of any color to cast Case spells.

When this Case enters, choose target creature you don't control. Each creature you control deals 1 damage to that creature.

To solve — Three or more creatures attacked this turn. (If unsolved, solve at the beginning of your end step.)

Solved — Creatures you control get +1/+0.

Whenever a Detective you control enters or is turned face up, put a +1/+1 counter on it.

To solve — You control three or more Detectives. (If unsolved, solve at the beginning of your end step.)

Solved — If one or more tokens would be created under your control, those tokens plus a Clue token are created instead.