Strive — This spell costs more to cast for each target beyond the first.
Choose any number of target opponents. Create X 1/1 white Human Soldier creature tokens, where X is the number of creatures those opponents control.

Search your library for a planeswalker card, reveal it, put it into your hand, then shuffle.

As this enchantment enters, choose a color and an opponent.
White creatures get +1/+1 as long as the chosen color is the most common color among nontoken permanents the chosen player controls but isn't tied for most common.
When the chosen color isn't the most common color among nontoken permanents the chosen player controls or is tied for most common, sacrifice this enchantment.

Untap all creatures you control. Samurai creatures you control get +1/+1 until end of turn.

Enchant nonblack creature
Enchanted creature gets +1/+2, has flying, and is an Angel in addition to its other types.

, : This creature loses this ability and becomes an Aura enchantment with enchant creature. Attach it to target creature. You may pay to end this effect.
Enchanted creature can't attack.

Banding
As long as this creature is attacking, prevent all damage Deserts would deal to this creature and to creatures banded with this creature.

Flash
When Candela enters, return up to one target creature you control to its owner's hand. It perpetually gets +1/+1.
Station (Tap another creature you control: Put charge counters equal to its power on this Spacecraft. Station only as a sorcery. It's an artifact creature at 8+.)
8+: Flying
Whenever Candela deals combat damage to a player, you may put a creature card with mana value 3 or less from your hand onto the battlefield.
3/3

Coven — At the beginning of combat on your turn, if you control three or more creatures with different powers, this creature gains flying until end of turn.

Enchant creature
Enchanted creature gets +3/+2 and has vigilance.

Prevent the next 3 damage that would be dealt to any target this turn. You gain life equal to the damage prevented this way.
Splice onto Arcane

Enchant creature
Enchanted creature has defender.
Prevent all combat damage that would be dealt by enchanted creature.
Coven — , Sacrifice this Aura: Exile enchanted creature. Activate only if you control three or more creatures with different powers.

Landfall — Whenever a land you control enters, creatures you control get +1/+1 until end of turn.

Whenever this creature saddles a Mount or crews a Vehicle during your main phase, that Mount or Vehicle gains flying until end of turn.

First strike
: This creature gets +1/+0 until end of turn.

Enchant creature
Enchanted creature gets +1/+1.
, Sacrifice this Aura: Draw a card.

: This creature gets +0/+1 until end of turn.

, , Sacrifice this creature: Destroy target artifact or enchantment.

Flash
Vigilance
Devour artifact 1

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.

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.

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.