Lore Seeker

{3}{B}, Exile a permanent you control with a League of Dastardly Doom watermark: Return a permanent card with a League of Dastardly Doom watermark from your graveyard to the battlefield.

Whenever a creature attacks you or a permanent you control, that creature doesn't untap during its controller's next untap step.

When you set this scheme in motion, until your next turn, whenever a player taps a land for mana, that player adds one mana of any type that land produced.

Search your library for a Knight creature card, reveal it, put it into your hand, then shuffle your library. You gain 4 life.

When you set this scheme in motion, look at the top six cards of your library. You may put a creature card from among them onto the battlefield. Put the rest on the bottom of your library in any order.

Target player puts the top three cards of their library into their graveyard.
Decipher {6}{U}

Exile target attacking creature. Then remove it from the game. Then put it into the absolutely-removed-from-the-freaking-game-forever zone.

As an additional cost to cast this spell, discard X cards.
Look at target opponent's hand and choose X cards from it. That player discards those cards.

Up to two target creatures each get +1/+0 and gain first strike until end of turn.
Madness {1}{R}

When Abandoned Bonfire enters the battlefield, you gain 2 life.
{T}: Add {C}.

Abandoned Outpost enters the battlefield tapped.
{T}: Add {W}.
{T}, Sacrifice Abandoned Outpost: Add one mana of any color.

First strike
Whenever a creature dealt damage by Abattoir Ghoul this turn dies, you gain life equal to that creature's toughness.

Frenzy 2
Whenever Abberrant Idealon becomes blocked, distribute two -1/-1 counters among one or two creatures defending player controls.

Flying, protection from red

Flying, vigilance

{W}, {T}: Abbey Matron gets +0/+3 until end of turn.

Enchant creature
When Abduction enters the battlefield, untap enchanted creature.
You control enchanted creature.
When enchanted creature dies, return that card to the battlefield under its owner's control.

Flying
At the beginning of your upkeep, put the top card of your library into your graveyard. If it's an instant or sorcery card, transform Aberrant Researcher.

As an additional cost to cast this spell, sacrifice a blue permanent.
Counter target spell.

Until end of turn, target creature gets +2/+0 and gains "When this creature dies, return it to the battlefield tapped under its owner's control."

You may discard a Plains card rather than pay this spell's mana cost.
Destroy target artifact or enchantment.

Trample
Abominable Treefolk's power and toughness are each equal to the number of snow permanents you control.
When Abominable Treefolk enters the battlefield, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.

Whenever Abomination blocks or becomes blocked by a green or white creature, destroy that creature at end of combat.

Flying
Whenever Abomination of Gudul deals combat damage to a player, you may draw a card. If you do, discard a card.
Morph {2}{B}{G}{U}

Enchant creature
Enchanted creature has flying.
Threshold — Enchanted creature has shroud as long as seven or more cards are in your graveyard.