Counterspell

Howl from Beyond

Target creature gets +X/+0 until end of turn.

Evil Eye of Orms-by-Gore

Non-Eye creatures you control can't attack.
Evil Eye of Orms-by-Gore can't be blocked except by Walls.

Leaden Fists

Flash (You may cast this spell any time you could cast an instant.)
Enchant creature
Enchanted creature gets +3/+3 and doesn't untap during its controller's untap step.

Obsessive Search

Draw a card.
Madness {U} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Spirit Link

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Whenever enchanted creature deals damage, you gain that much life.

High Tide

Until end of turn, whenever a player taps an Island for mana, that player adds an additional {U}.

Ornithopter

Lull

Prevent all combat damage that would be dealt this turn.
Cycling {2} ({2}, Discard this card: Draw a card.)

Overmaster

The next instant or sorcery spell you cast this turn can't be countered.
Draw a card.

Spectral Lynx

Protection from green
{B}: Regenerate Spectral Lynx.

Nomad Decoy

{W}, {T}: Tap target creature.
Threshold — {W}{W}, {T}: Tap two target creatures. Activate only if seven or more cards are in your graveyard.

Mountain

Goblin Medics

Whenever Goblin Medics becomes tapped, it deals 1 damage to any target.

Man-o'-War

When Man-o'-War enters, return target creature to its owner's hand.

Street Wraith

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
Cycling—Pay 2 life. (Pay 2 life, Discard this card: Draw a card.)

Improvised Armor

Enchant creature
Enchanted creature gets +2/+5.
Cycling {3} ({3}, Discard this card: Draw a card.)

Swamp

Island

Griffin Guide

Enchant creature
Enchanted creature gets +2/+2 and has flying.
When enchanted creature dies, create a 2/2 white Griffin creature token with flying.

Mind Stone

{T}: Add {C}.
{1}, {T}, Sacrifice Mind Stone: Draw a card.

Auramancer

When Auramancer enters, you may return target enchantment card from your graveyard to your hand.

Cackling Fiend

When Cackling Fiend enters, each opponent discards a card.

Stonewood Invoker

{7}{G}: Stonewood Invoker gets +5/+5 until end of turn.

Forest

Elvish Spirit Guide

Exile Elvish Spirit Guide from your hand: Add {G}.

Phyrexian Debaser

Flying
{T}, Sacrifice Phyrexian Debaser: Target creature gets -2/-2 until end of turn.

Skirk Prospector

Crawlspace

No more than two creatures can attack you each combat.

Whitemane Lion

Flash
When Whitemane Lion enters, return a creature you control to its owner's hand.

Seton's Desire

Enchant creature
Enchanted creature gets +2/+2.
Threshold — As long as seven or more cards are in your graveyard, all creatures able to block enchanted creature do so.

Arcanis the Omnipotent

{T}: Draw three cards.
{2}{U}{U}: Return Arcanis to its owner's hand.

Krosan Restorer

{T}: Untap target land.
Threshold — {T}: Untap up to three target lands. Activate only if seven or more cards are in your graveyard.

Reality

Illusion

Target spell or permanent becomes the color of your choice until end of turn.

Illusion // Reality

Aquamoeba

Discard a card: Switch Aquamoeba's power and toughness until end of turn.

Terror

Destroy target nonartifact, nonblack creature. It can't be regenerated.

Thran Golem

As long as Thran Golem is enchanted, it gets +2/+2 and has flying, first strike, and trample.

Fa'adiyah Seer

{T}: Draw a card and reveal it. If it isn't a land card, discard it.

Mesa Enchantress

Whenever you cast an enchantment spell, you may draw a card.

Snap

Return target creature to its owner's hand. Untap up to two lands.

Duress

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

Confiscate

Enchant permanent
You control enchanted permanent.

Quicksilver Dagger

Enchant creature
Enchanted creature has "{T}: This creature deals 1 damage to target player or planeswalker. You draw a card."