Giant Spider

Reach (This creature can block creatures with flying.)

Unsummon

Return target creature to its owner's hand.

Akroma, Angel of Wrath

Flying, first strike, vigilance, trample, haste, protection from black and from red

Suntail Hawk

Cowardice

Whenever a creature becomes the target of a spell or ability, return that creature to its owner's hand. (It won't be affected by the spell or ability.)

Horned Turtle

Threaten

Untap target creature and gain control of it until end of turn. That creature gains haste until end of turn. (It can attack and {T} this turn.)

Magma Giant

When Magma Giant enters, it deals 2 damage to each creature and each player.

Maraxus of Keld

Maraxus of Keld's power and toughness are each equal to the number of untapped artifacts, creatures, and lands you control.

Havoc Demon

Flying
When Havoc Demon dies, all creatures get -5/-5 until end of turn.

Spelljack

Counter target spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard. You may play it without paying its mana cost for as long as it remains exiled. (If it has X in its mana cost, X is 0.)

Ihsan's Shade

Retromancer

Whenever Retromancer becomes the target of a spell or ability, Retromancer deals 3 damage to that spell or ability's controller.

Gratuitous Violence

If a creature you control would deal damage to a permanent or player, it deals double that damage instead.

Avatar of Might

If an opponent controls at least four more creatures than you, this spell costs {6} less to cast.
Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Counterspell

Infest

All creatures get -2/-2 until end of turn.

Divine Presence

If a source would deal 4 or more damage to a permanent or player, that source deals 3 damage to that permanent or player instead.

Run Wild

Until end of turn, target creature gains trample and "{G}: Regenerate this creature."

Fervor

Creatures you control have haste. (They can attack and {T} as soon as they come under your control.)

Test of Endurance

At the beginning of your upkeep, if you have 50 or more life, you win the game.

Hellfire

Destroy all nonblack creatures. Hellfire deals X plus 3 damage to you, where X is the number of creatures that died this way.

Giant Growth

Target creature gets +3/+3 until end of turn.

Angel of Retribution

Multani, Maro-Sorcerer

Shroud (This creature can't be the target of spells or abilities.)
Multani, Maro-Sorcerer's power and toughness are each equal to the total number of cards in all players' hands.

Warrior's Honor

Creatures you control get +1/+1 until end of turn.

Dark Banishing

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

Untamed Wilds

Search your library for a basic land card, put that card onto the battlefield, then shuffle.

Vicious Hunger

Vicious Hunger deals 2 damage to target creature and you gain 2 life.

Volcanic Dragon

Thunder Spirit

Rushwood Elemental

Trample
At the beginning of your upkeep, you may put a +1/+1 counter on Rushwood Elemental.

Gorilla Chieftain

Youthful Knight

Mana Short

Tap all lands target player controls and that player loses all unspent mana.

Overrun

Creatures you control get +3/+3 and gain trample until end of turn. (Each of those creatures can deal excess combat damage to the player or planeswalker it's attacking.)

Goblin Hero

Goblin Sky Raider

Flying (This creature can't be blocked except by creatures with flying or reach.)

Goblin King

Other Goblins get +1/+1 and have mountainwalk.

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.)

Deluge

Inferno

Inferno deals 6 damage to each creature and each player.

Mage's Guile

Target creature gains shroud until end of turn. (It can't be the target of spells or abilities.)
Cycling {U} ({U}, Discard this card: Draw a card.)

Juzám Djinn

At the beginning of your upkeep, Juzám Djinn deals 1 damage to you.

Defiant Elf

No Mercy

Whenever a creature deals damage to you, destroy it.

Sengir Vampire

Flying (This creature can't be blocked except by creatures with flying or reach.)
Whenever a creature dealt damage by Sengir Vampire this turn dies, put a +1/+1 counter on Sengir Vampire.

Fighting Drake

Raging Goblin

Haste (This creature can attack and {T} as soon as it comes under your control.)

Air Elemental

Spiritualize

Until end of turn, whenever target creature deals damage, you gain that much life.
Draw a card.

Demystify

Krovikan Vampire

At the beginning of each end step, if a creature dealt damage by Krovikan Vampire this turn died, put that card onto the battlefield under your control. Sacrifice it when you lose control of Krovikan Vampire.

Tranquility

Wind Drake

Death's-Head Buzzard

Flying
When Death's-Head Buzzard dies, all creatures get -1/-1 until end of turn.

Elvish Warrior

Wrath of God

Destroy all creatures. They can't be regenerated.

Soul Feast

Target player loses 4 life and you gain 4 life.

Arcanis the Omnipotent

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

Blessed Orator

Clone

You may have Clone enter as a copy of any creature on the battlefield.

Harbinger of Night

At the beginning of your upkeep, put a -1/-1 counter on each creature.

Reckless Charge

Target creature gets +3/+0 and gains haste until end of turn.
Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Priest of Titania

{T}: Add {G} for each Elf on the battlefield.

Carnophage

At the beginning of your upkeep, tap Carnophage unless you pay 1 life.

Pendrell Mists

All creatures have "At the beginning of your upkeep, sacrifice this creature unless you pay {1}."

Llanowar Elves

Scorching Missile

Scorching Missile deals 4 damage to target player or planeswalker.
Flashback {9}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Liability

Whenever a nontoken permanent is put into a player's graveyard from the battlefield, that player loses 1 life.

Ancient Silverback

{G}: Regenerate Ancient Silverback. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Guided Strike

Target creature gets +1/+0 and gains first strike until end of turn.
Draw a card.