Enchant creature
Enchanted creature gets +2/+2, has first strike and vigilance, and is a legendary Soldier in addition to its other types.
Whenever enchanted creature attacks or blocks, attach any number of target Equipment you control to it.

Artifact creatures you control have "Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."

When this creature enters, if you control a tapped creature, create a 1/1 white Warrior creature token with vigilance.

When this creature enters, put a +1/+1 counter on each other creature you control.

Flying
When this creature enters, put a +1/+1 counter on target creature.

Enchant nonland permanent
Enchanted permanent can't attack or block, and its activated abilities can't be activated.

Activated abilities cost more to activate unless they're mana abilities.

Destroy target black or red creature that's attacking or blocking. You gain 2 life.

You and permanents you control gain hexproof until end of turn. Prevent all damage that black and/or red sources would deal to creatures you control this turn.

Creatures you control get +1/+1 until end of turn. If you control a Kithkin, draw a card.

Choose one —
• Destroy target creature with toughness 4 or greater. You gain 1 life.
• You draw a card and gain 2 life.

(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)
When you unlock this door, return target creature card with mana value 3 or less from your graveyard to the battlefield.

(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)
Whenever you attack, put a +1/+1 counter on target attacking creature.

First strike
Ripple 4

Cast this spell only during combat.
You may put a nonwhite creature card from your hand onto the battlefield. At the beginning of the next end step, return that creature to your hand. (Return it only if it's on the battlefield.)

When Surprise Party enters yell "Surprise!" and put onto the battlefield any number of printed Clown Robot tokens that aren't touching each other, that you hid on the battlefield before you cast Surprise Party, and that weren't spotted by an opponent before you cast Surprise Party. Robots you control get +1/+0 and have vigilance.

You gain 2 life. Then if you have more life than an opponent, draw a card.
Rebound

Target creature gets +1/+0 and gains indestructible until end of turn.
Investigate.

First strike
, Exile this card from your graveyard: Scry 2.

When this enchantment enters, you may exile target creature with toughness 3 or greater until this enchantment leaves the battlefield. (That creature returns under its owner's control.)

Flying
Whenever this creature blocks, it gets +0/+2 until end of turn.

Cumulative upkeep
Damage that would reduce your life total to less than 1 reduces it to 1 instead.

Whenever another creature you control enters, you may gain 1 life.
Whenever a creature an opponent controls enters, you may have that player lose 1 life.

Flying
: Regenerate target creature.

As an additional cost to cast this spell, tap an untapped creature you control.
Exile target tapped creature. Put a +1/+1 counter on the creature tapped to pay this spell's additional cost.

Creatures you control get +2/+2 until end of turn.
Reinforce X —

Until end of turn, target creature gets +1/+0 and gains first strike and lifelink.

Prevent the next 2 damage that would be dealt to any target this turn.
Draw a card at the beginning of the next turn's upkeep.

Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, you may cast this spell as though it had flash.
Destroy target tapped creature.

Flash
Enchant creature or Vehicle
Enchanted permanent is a Vehicle artifact with crew 5 and it loses all other card types. (It's not a creature unless it's crewed.)