Lore Seeker

{T}: Each opponent puts the top card of their library into their graveyard.
{3}, {T}: Exile three target cards from an opponent's graveyard. Draw a card.

You may cast spells that have a cycling ability from your graveyard.
If a card that has a cycling ability would be put into your graveyard from anywhere and it wasn't cycled, exile it instead.

{T}: Add {W}, {B}, or {G}.
{W}{B}{G}, {T}, Sacrifice Abzan Banner: Draw a card.

Equipped creature gets +0/+3 and has vigilance.
Equip {3}

Whenever Accursed Bookwurm attacks, choose a card name, then reveal a card at random from your hand. If that card has the chosen name, Accursed Bookwurm deals 3 damage to any target.

{4}, {T}: Whenever target creature deals combat damage to a non-Wall creature this turn, destroy that non-Wall creature. When the targeted creature leaves the battlefield this turn, sacrifice Acidic Dagger. Activate this ability only before blockers are declared.

{1}, {T}: Acorn Catapult deals 1 damage to any target. That permanent's controller or that player creates a 1/1 green Squirrel creature token.

As Adaptive Automaton enters the battlefield, choose a creature type.
Adaptive Automaton is the chosen type in addition to its other types.
Other creatures you control of the chosen type get +1/+1.

Landfall — Whenever a land enters the battlefield under your control, equipped creature gets +2/+2 until end of turn.
Equip {1}

{4}{W}: Return another target creature you control to its owner's hand.

{1}, {T}: Target 1/1 creature gets +1/+2 until end of turn.

{1}, {T}, Sacrifice Aeolipile: It deals 2 damage to any target.

Flying
Aesthir Glider can't block.

{U}, Sacrifice Aether Spellbomb: Return target creature to its owner's hand.
{1}, Sacrifice Aether Spellbomb: Draw a card.

At the beginning of your upkeep, you may put a charge counter on Aether Vial.
{T}: You may put a creature card with converted mana cost equal to the number of charge counters on Aether Vial from your hand onto the battlefield.

Whenever you cast a spell, you gain 1 life for each spell you've cast this turn.
Pay 50 life: Aetherflux Reservoir deals 50 damage to any target.

{1}, {T}, Exile an instant or sorcery spell you control: Search your library for a card with converted mana cost equal to 1 plus the exiled spell's converted mana cost that shares a card type with it, cast it without paying its mana cost, then shuffle your library.

Flying
When Aethersphere Harvester enters the battlefield, you get {E}{E}.
Pay {E}: Aethersphere Harvester gains lifelink until end of turn.
Crew 1

Whenever a permanent you control is put into a graveyard, you get {E}.
{T}, Pay {E}{E}{E}{E}{E}{E}: Look at the top six cards of your library. You may cast a spell from among them without paying its mana cost. Put the rest on the bottom of your library in a random order.

Draft Agent of Acquisitions face up.
Instead of drafting a card from a booster pack, you may draft each card in that booster pack, one at a time. If you do, turn Agent of Acquisitions face down and you can't draft cards for the rest of this draft round.

Defender
When Akroan Horse enters the battlefield, an opponent gains control of it.
At the beginning of your upkeep, each opponent creates a 1/1 white Soldier creature token.

When Alchemist's Vial enters the battlefield, draw a card.
{1}, {T}, Sacrifice Alchemist's Vial: Target creature can't attack or block this turn.

{2}, {T}: Target permanent you control becomes the color of your choice.

When Aligned Hedron Network enters the battlefield, exile all creatures with power 5 or greater until Aligned Hedron Network leaves the battlefield.

Whenever another artifact enters the battlefield under your control, you may pay {1}. If you do, put a +1/+1 counter on Alloy Array, then you may have it become a 0/0 Construct artifact creature until end of turn.
{7}: Create a 1/1 colorless Thopter artifact creature token with flying.