Whenever you crank Applied Aeronautics, until end of turn, target creature gets +1/+0, gains flying, and becomes an artifact in addition to its other types.

Reach

Training (Whenever this creature attacks with another creature with greater power, put a +1/+1 counter on this creature.)

, : Add .

As Aquamorph Entity enters or is turned face up, it becomes your choice of 5/1 or 1/5.

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

When Aquatic Incursion enters, create two 1/1 blue Merfolk creature tokens with hexproof. (They can't be the targets of spells or abilities your opponents control.)

: Target Merfolk can't be blocked this turn.

Enchant creature

Enchanted creature can't be blocked.

Whenever enchanted creature attacks, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Whenever Arabella, Abandoned Doll attacks, it deals X damage to each opponent and you gain X life, where X is the number of creatures you control with power 2 or less.

Create X 1/2 green Spider creature tokens with reach, where X is the number of creatures attacking you. Prevent all combat damage that would be dealt this turn by non-Spider creatures.

Target creature gets +2/+2 and gains reach until end of turn. Untap it.

Enchant creature

Enchanted creature can't attack or block, and its activated abilities can't be activated.

At the beginning of the end step, if enchanted creature's power is 4 or greater, destroy Arachnus Web.

Enlist (As this creature attacks, you may tap a nonattacking creature you control without summoning sickness. When you do, add its power to this creature's until end of turn.)

Whenever a creature you control attacks, if it enlisted a creature this combat, the creature that attacked gains double strike until end of turn. If that creature's power is 4 or greater, draw a card.

Whenever the Ring tempts you, if you chose a creature other than Aragorn, Company Leader as your Ring-bearer, put your choice of a counter from among first strike, vigilance, deathtouch, and lifelink on Aragorn.

Whenever you put one or more counters on Aragorn, put one of each of those kinds of counters on up to one other target creature.

Vigilance, lifelink

When Aragorn, King of Gondor enters, you become the monarch.

Whenever Aragorn attacks, up to one target creature can't block this turn. If you're the monarch, creatures can't block this turn.

Eminence — At the beginning of combat on your turn, if Arahbo, Roar of the World is in the command zone or on the battlefield, another target Cat you control gets +3/+3 until end of turn.

Whenever another Cat you control attacks, you may pay . If you do, it gains trample and gets +X/+X until end of turn, where X is its power.

, : Arashi, the Sky Asunder deals X damage to target creature with flying.

Channel — , Discard Arashi: Arashi deals X damage to each creature with flying.

Double strike

Whenever Arashin Foremost enters or attacks, another target Warrior creature you control gains double strike until end of turn.

Whenever Arashin War Beast deals combat damage to one or more blocking creatures, manifest the top card of your library. (Put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)

, Exile cards from your graveyard equal to the number of opponents you have: Target creature card in your graveyard gains encore until end of turn. The encore cost is equal to its mana cost. (Exile the creature card and pay its mana cost: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)

, : Arbalest Elite deals 3 damage to target attacking or blocking creature. Arbalest Elite doesn't untap during your next untap step.

Vigilance

When Arbiter of Knollridge enters, each player's life total becomes the highest life total among all players.

As an additional cost to cast this spell, sacrifice a creature.

Flying

When this creature enters, each opponent discards a card and loses 2 life. You draw a card and gain 2 life.

Reach

: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)

When Arbor Colossus becomes monstrous, destroy target creature with flying an opponent controls.

Trample

When Arborback Stomper enters, you gain 5 life.

When Arboreal Alliance enters, create an X/X green Treefolk creature token.

Whenever you attack with one or more Elves, populate. (Create a token that's a copy of a creature token you control.)

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Arc Blade deals 2 damage to any target. Exile Arc Blade with three time counters on it.

Suspend 3— (Rather than cast this card from your hand, you may pay and exile it with three time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost.)

, , Discard a card: Arc Mage deals 2 damage divided as you choose among one or two targets.

Equipped creature has ": This creature deals 1 damage to target creature that's blocking it."

Equip (: Attach to target creature you control. Equip only as a sorcery.)

: Draw a card, then discard a card. Put a quest counter on Arcade Gannon.

For Auld Lang Syne — Once during each of your turns, you may cast an artifact or Human spell from your graveyard with mana value less than or equal to the number of quest counters on Arcade Gannon.

Flying, vigilance

Whenever a creature you control with defender enters, draw a card.

Each creature you control with defender assigns combat damage equal to its toughness rather than its power and can attack as though it didn't have defender.

Target creature gets +3/+3 and gains reach and trample until end of turn.

You get a boon with "When you cast your next creature spell, that creature enters the battlefield with an additional +1/+1 counter, reach counter, and trample counter on it."

Whenever you cast your first instant or sorcery spell each turn, exile an instant or sorcery card at random from your graveyard. Then copy each card exiled with Arcane Bombardment. You may cast any number of the copies without paying their mana costs.

, : Draw a card.

This spell costs less to cast if you control a Wizard.

Draw three cards.

You may cast target instant or sorcery card from an opponent's graveyard without paying its mana cost. If that spell would be put into their graveyard, exile it instead.

Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

Search the Room — : Roll a d20.

1–9 | Draw a card.

10–20 | Look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.

: Add .

, : Until end of turn, creatures your opponents control lose hexproof and shroud and can't have hexproof or shroud.

When Arcane Proxy enters, if you cast it, exile target instant or sorcery card with mana value less than or equal to Arcane Proxy's power from your graveyard. Copy that card. You may cast the copy without paying its mana cost.

//PRT-Prototype_Mech//

Prototype (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.)

2/1

Before you shuffle your deck to start the game, you may reveal this card from your deck and exile an instant or sorcery card you drafted that isn't in your deck.

When Arcane Savant enters, copy a card you exiled with cards named Arcane Savant. You may cast the copy without paying its mana cost.

, , Sacrifice a land: Draw a card and put a charge counter on Arcane Spyglass.

Remove three charge counters from Arcane Spyglass: Draw a card.

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)

Enchanted creature gets +2/+2 and has ": This creature deals 1 damage to any target."

Flying

When Arcanist's Owl enters, look at the top four cards of your library. You may reveal an artifact or enchantment card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Enchant creature

Enchanted creature has flying.

Aura swap (: Exchange this Aura with an Aura card in your hand.)

Modular 3 (This creature enters with three +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Trample

Whenever another artifact enters, put a +1/+1 counter on Arcbound Crusher.

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.)

Haste

Modular 2 (This creature enters with two +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

First strike

Modular 4 (This creature enters with four +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

At the beginning of your upkeep, put a +1/+1 counter on each creature you control with modular.

Modular 6 (This creature enters with six +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Sacrifice an artifact: Put a +1/+1 counter on Arcbound Ravager.

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.)

First strike

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

Modular 2 (This creature enters with two +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)