Cast this spell only during the declare attackers step and only if you've been attacked this step.
Prevent all damage that would be dealt to you this turn by attacking creatures.

Prevent all combat damage that would be dealt this turn.
Each attacking creature doesn't untap during its controller's next untap step.

Defender
When this creature enters, draw a card.

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)

Cast this spell only during the declare attackers step and only if you've been attacked this step.
Destroy target nonblack attacking creature.

Whenever you sacrifice another permanent, you may pay . If you do, create a token that's a copy of this creature.

This artifact enters tapped.
: Add .

As this creature enters, choose a color.
Whenever you cast a spell of the chosen color, you gain 1 life.

Create an X/X black and green Spirit Warrior creature token, where X is the greatest toughness among creatures you control.

When this creature enters, add .

Backup 1 (When this creature enters, put a +1/+1 counter on target creature. If that's another creature, it gains the following ability until end of turn.)
This creature assigns combat damage equal to its toughness rather than its power.

Flying
Whenever this creature deals combat damage to a player, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Flying
Whenever this creature attacks, create a 1/1 white Soldier creature token that's tapped and attacking.

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)
Equip

Hideaway 4 (When this creature enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.)
This creature enters tapped.
When this creature leaves the battlefield, put the exiled card into its owner's hand.

Rolling Thunder deals X damage divided as you choose among any number of targets.

: Mill two cards. (Put the top two cards of your library into your graveyard.)
, Exile this artifact: Shuffle any number of target cards from your graveyard into your library.

This creature gets +1/+1 as long as you control a Swamp.
: Regenerate this creature. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

When this enchantment enters, search your library for a basic land card, reveal it, put it into your hand, then shuffle.
, Sacrifice this enchantment: You gain 2 life and draw two cards. Target opponent loses 2 life. This enchantment deals 2 damage to up to one target creature. You create a 2/2 green Bear creature token.

If one or more -1/-1 counters would be put on a creature you control, that many -1/-1 counters minus one are put on it instead.

Equipped creature has nonbasic landwalk. (It can't be blocked as long as defending player controls a nonbasic land.)
Equip

Choose one —
• Destroy target creature with no counters on it.
• Remove up to three counters from target creature.

This creature can't block.
At the beginning of your upkeep, put a +1/+1 counter on this creature and you lose 1 life.

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)

Attacking creatures you control get +1/+0.

Destroy target monocolored creature.

Protection from green (This creature can't be blocked, targeted, dealt damage, enchanted, or equipped by anything green.)
Creatures your opponents control can't have +1/+1 counters put on them.

When equipped creature deals combat damage to a player, sacrifice this Equipment. If you do, draw three cards.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Flash
Enchant creature
Enchanted creature gets -2/-0 and loses all abilities. (Mutating onto the creature won't give it new abilities. It can gain abilities in other ways.)

Whenever this creature becomes the target of a spell or ability, mill three cards.
, : Prevent all combat damage that would be dealt to and dealt by target creature you control this turn.

When this Equipment enters, create a 1/1 colorless Thopter artifact creature token with flying, then attach this Equipment to it.
Equipped creature gets +1/+0.
Equip

Whenever this creature deals combat damage to a player, put a +1/+1 counter on it.
Modular 1 (This creature enters with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

As long as you control a Plains, this creature has first strike and lifelink. (Damage dealt by a creature with lifelink also causes its controller to gain that much life.)

Kicker (You may pay an additional as you cast this spell.)
Exile target artifact or enchantment. If this spell was kicked, exile target nonland permanent instead.

Search your library for a Forest card, put that card onto the battlefield, then shuffle.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever you cast a noncreature spell, this creature gains lifelink until end of turn.