Sphere of Reason

If a blue source would deal damage to you, prevent 2 of that damage.

Mountain

Chlorophant

At the beginning of your upkeep, you may put a +1/+1 counter on this creature.
Threshold — As long as seven or more cards are in your graveyard, this creature has "At the beginning of your upkeep, you may put another +1/+1 counter on this creature."

Resilient Wanderer

First strike
Discard a card: This creature gains protection from the color of your choice until end of turn.

Painbringer

{T}, Exile any number of cards from your graveyard: Target creature gets -X/-X until end of turn, where X is the number of cards exiled this way.

Strength of Isolation

Enchant creature
Enchanted creature gets +1/+2 and has protection from black.
Madness {W} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Riftstone Portal

{T}: Add {C}.
As long as this card is in your graveyard, lands you control have "{T}: Add {G} or {W}."

Plains

Gorilla Titan

Trample
This creature gets +4/+4 as long as there are no cards in your graveyard.

Still Life

{G}{G}: This enchantment becomes a 4/3 Centaur creature in addition to its other types until end of turn.

Execute

Destroy target white creature. It can't be regenerated.
Draw a card.

Whispering Shade

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
{B}: This creature gets +1/+1 until end of turn.

Morgue Theft

Return target creature card from your graveyard to your hand.
Flashback {4}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Tainted Peak

{T}: Add {C}.
{T}: Add {B} or {R}. Activate only if you control a Swamp.

Swamp

Churning Eddy

Return target creature and target land to their owners' hands.

Nantuko Disciple

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

Ancestral Tribute

You gain 2 life for each card in your graveyard.
Flashback {9}{W}{W}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Aven Cloudchaser

Flying (This creature can't be blocked except by creatures with flying or reach.)
When this creature enters, destroy target enchantment.

Zombie Assassin

{T}, Exile two cards from your graveyard and this creature: Destroy target nonblack creature. It can't be regenerated.

False Memories

Mill seven cards. At the beginning of the next end step, exile seven cards from your graveyard.

Accelerate

Target creature gains haste until end of turn.
Draw a card.

Deluge

Phantatog

Sacrifice an enchantment: This creature gets +1/+1 until end of turn.
Discard a card: This creature gets +1/+1 until end of turn.

Pitchstone Wall

Defender (This creature can't attack.)
Whenever you discard a card, you may sacrifice this creature. If you do, return the discarded card from your graveyard to your hand.

Frightcrawler

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
Threshold — As long as seven or more cards are in your graveyard, this creature gets +2/+2 and can't block.

Vivify

Target land becomes a 3/3 creature until end of turn. It's still a land.
Draw a card.

Leaf Dancer

Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)

Anurid Scavenger

Protection from black
At the beginning of your upkeep, sacrifice this creature unless you put a card from your graveyard on the bottom of your library.

Engulfing Flames

Engulfing Flames deals 1 damage to target creature. It can't be regenerated this turn.
Flashback {3}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Gloomdrifter

Flying
Threshold — As long as seven or more cards are in your graveyard, this creature has "When this creature enters, nonblack creatures get -2/-2 until end of turn."

Sylvan Might

Target creature gets +2/+2 and gains trample until end of turn.
Flashback {2}{G}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Moment's Peace

Prevent all combat damage that would be dealt this turn.
Flashback {2}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Anarchist

When this creature enters, you may return target sorcery card from your graveyard to your hand.

Pardic Firecat

Haste
If this card is in a graveyard, effects from spells named Flame Burst count it as a card named Flame Burst.

Aquamoeba

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

Breakthrough

Draw four cards, then choose X cards in your hand and discard the rest.

Fervent Denial

Counter target spell.
Flashback {5}{U}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Jeska, Warrior Adept

First strike, haste
{T}: Jeska deals 1 damage to any target.

Krosan Archer

Reach (This creature can block creatures with flying.)
{G}, Discard a card: This creature gets +0/+2 until end of turn.

Darkwater Egg

{2}, {T}, Sacrifice this artifact: Add {U}{B}. Draw a card.

Grim Lavamancer

{R}, {T}, Exile two cards from your graveyard: This creature deals 2 damage to any target.

Piper's Melody

Shuffle any number of target creature cards from your graveyard into your library.

Island

Embolden

Prevent the next 4 damage that would be dealt this turn to any number of targets, divided as you choose.
Flashback {1}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Serene Sunset

Prevent all combat damage X target creatures would deal this turn.

Boneshard Slasher

Flying
Threshold — As long as seven or more cards are in your graveyard, this creature gets +2/+2 and has "When this creature becomes the target of a spell or ability, sacrifice it."

Sphere of Grace

If a black source would deal damage to you, prevent 2 of that damage.

Cabal Surgeon

{2}{B}{B}, {T}, Exile two cards from your graveyard: Return target creature card from your graveyard to your hand.

Diabolic Tutor

Search your library for a card, put that card into your hand, then shuffle.

Phantom Flock

Flying
This creature enters with three +1/+1 counters on it.
If damage would be dealt to this creature, prevent that damage. Remove a +1/+1 counter from this creature.

Demoralize

All creatures gain menace until end of turn. (They can't be blocked except by two or more creatures.)
Threshold — If seven or more cards are in your graveyard, creatures can't block this turn.

Toxic Stench

Target nonblack creature gets -1/-1 until end of turn.
Threshold — If seven or more cards are in your graveyard, instead destroy that creature. It can't be regenerated.

Mortiphobia

{1}{B}, Discard a card: Exile target card from a graveyard.
{1}{B}, Sacrifice this enchantment: Exile target card from a graveyard.

Pulsating Illusion

Flying
Discard a card: This creature gets +4/+4 until end of turn. Activate only once each turn.

Upheaval

Return all permanents to their owners' hands.

Lava Blister

Destroy target nonbasic land unless its controller has Lava Blister deal 6 damage to them.

Darkwater Catacombs

Bearscape

{1}{G}, Exile two cards from your graveyard: Create a 2/2 green Bear creature token.

Silver Seraph

Flying
Threshold — Other creatures you control get +2/+2 as long as seven or more cards are in your graveyard.

Quiet Speculation

Search target player's library for up to three cards with flashback and put them into that player's graveyard. Then the player shuffles.