Have

Abandon Attachments

You may discard a card. If you do, draw two cards.

Annul

Counter target artifact or enchantment spell.

Envelop

Tolarian Terror

This spell costs {1} less to cast for each instant and sorcery card in your graveyard.
Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.)

Thought Scour

Target player mills two cards.
Draw a card.

Dispel

Spell Pierce

Counter target noncreature spell unless its controller pays {2}.

Nihil Spellbomb

{T}, Sacrifice this artifact: Exile target player's graveyard.
When this artifact is put into a graveyard from the battlefield, you may pay {B}. If you do, draw a card.

Lórien Revealed

Draw three cards.
Islandcycling {1} ({1}, Discard this card: Search your library for an Island card, reveal it, put it into your hand, then shuffle.)

Sneaky Snacker

Flying
When you draw your third card in a turn, return this card from your graveyard to the battlefield tapped.

Unexpected Fangs

Put a +1/+1 counter and a lifelink counter on target creature.

Mental Note

Ice Tunnel

({T}: Add {U} or {B}.)
This land enters tapped.

Arms of Hadar

Creatures target player controls get -2/-2 until end of turn.

Murmuring Mystic

Whenever you cast an instant or sorcery spell, create a 1/1 blue Bird Illusion creature token with flying.

Counterspell

Snuff Out

If you control a Swamp, you may pay 4 life rather than pay this spell's mana cost.
Destroy target nonblack creature. It can't be regenerated.

Cast Down

Contaminated Aquifer

Gurmag Angler

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)

Island

Blue Elemental Blast

Choose one —
• Counter target red spell.
• Destroy target red permanent.

Steel Sabotage

Choose one —
• Counter target artifact spell.
• Return target artifact to its owner's hand.

Extract a Confession

As an additional cost to cast this spell, you may collect evidence 6. (Exile cards with total mana value 6 or greater from your graveyard.)
Each opponent sacrifices a creature of their choice. If evidence was collected, instead each opponent sacrifices a creature with the greatest power among creatures they control.

Brainstorm

Draw three cards, then put two cards from your hand on top of your library in any order.