Fling

As an additional cost to cast this spell, sacrifice a creature.
Fling deals damage equal to the sacrificed creature's power to any target.

Traitorous Instinct

Gain control of target creature until end of turn. Untap that creature. Until end of turn, it gets +2/+0 and gains haste.

Krenko's Command

Create two 1/1 red Goblin creature tokens.

Lavinia of the Tenth

Protection from red
When Lavinia of the Tenth enters, detain each nonland permanent your opponents control with mana value 4 or less. (Until your next turn, those permanents can't attack or block and their activated abilities can't be activated.)

Island

Devout Invocation

Tap any number of untapped creatures you control. Create a 4/4 white Angel creature token with flying for each creature tapped this way.

Tormentor's Trident

Equipped creature gets +3/+0 and attacks each combat if able.
Equip {3}

Viashino Firstblade

Haste
When Viashino Firstblade enters, it gets +2/+2 until end of turn.

Fireball

This spell costs {1} more to cast for each target beyond the first.
Fireball deals X damage divided evenly, rounded down, among any number of targets.

Volcanic Strength

Enchant creature
Enchanted creature gets +2/+2 and has mountainwalk. (It can't be blocked as long as defending player controls a Mountain.)

Arrows of Justice

Arrows of Justice deals 4 damage to target attacking or blocking creature.

Slayer of the Wicked

When Slayer of the Wicked enters, you may destroy target Vampire, Werewolf, or Zombie.

Boros Cluestone

{T}: Add {R} or {W}.
{R}{W}, {T}, Sacrifice Boros Cluestone: Draw a card.

Elgaud Shieldmate

Soulbond (You may pair this creature with another unpaired creature when either enters. They remain paired for as long as you control both of them.)
As long as Elgaud Shieldmate is paired with another creature, both creatures have hexproof. (They can't be the targets of spells or abilities your opponents control.)

Fires of Undeath

Fires of Undeath deals 2 damage to any target.
Flashback {5}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Wildblood Pack

Trample
Attacking creatures you control get +3/+0.
At the beginning of each upkeep, if a player cast two or more spells last turn, transform Wildblood Pack.

Instigator Gang

Attacking creatures you control get +1/+0.
At the beginning of each upkeep, if no spells were cast last turn, transform Instigator Gang.

Instigator Gang // Wildblood Pack

Aven Squire

Flying
Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)

Izzet Guildgate

This land enters tapped.
{T}: Add {U} or {R}.

Guttersnipe

Whenever you cast an instant or sorcery spell, this creature deals 2 damage to each opponent.

Ajani's Sunstriker

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Burning Oil

Burning Oil deals 3 damage to target attacking or blocking creature.
Flashback {3}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Angelic Wall

Defender (This creature can't attack.)
Flying

Rain of Blades

Rain of Blades deals 1 damage to each attacking creature.

Volcanic Geyser

Volcanic Geyser deals X damage to any target.

Azorius Guildgate

This land enters tapped.
{T}: Add {W} or {U}.

Crimson Muckwader

Crimson Muckwader gets +1/+1 as long as you control a Swamp.
{2}{B}: Regenerate Crimson Muckwader. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Ancient Grudge

Destroy target artifact.
Flashback {G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Burden of Guilt

Enchant creature
{1}: Tap enchanted creature.

Gore-House Chainwalker

Unleash (You may have this creature enter with a +1/+1 counter on it. It can't block as long as it has a +1/+1 counter on it.)

Palisade Giant

All damage that would be dealt to you and other permanents you control is dealt to Palisade Giant instead.

Blood Ogre

Bloodthirst 1 (If an opponent was dealt damage this turn, this creature enters with a +1/+1 counter on it.)
First strike (This creature deals combat damage before creatures without first strike.)

Encroaching Wastes

{T}: Add {C}.
{4}, {T}, Sacrifice Encroaching Wastes: Destroy target nonbasic land.

Dearly Departed

Flying
As long as Dearly Departed is in your graveyard, each Human creature you control enters with an additional +1/+1 counter on it.

Wild Guess

As an additional cost to cast this spell, discard a card.
Draw two cards.

Mindclaw Shaman

When Mindclaw Shaman enters, target opponent reveals their hand. You may cast an instant or sorcery spell from among those cards without paying its mana cost.

Invisible Stalker

Hexproof (This creature can't be the target of spells or abilities your opponents control.)
Invisible Stalker can't be blocked.

Assault Griffin

Gorehorn Minotaurs

Bloodthirst 2 (If an opponent was dealt damage this turn, this creature enters with two +1/+1 counters on it.)

Mountain

Madcap Skills

Enchant creature
Enchanted creature gets +3/+0 and has menace.

Alabaster Mage

{1}{W}: Target creature you control gains lifelink until end of turn. (Damage dealt by the creature also causes its controller to gain that much life.)

Angelic Edict

Erase

Riders of Gavony

Vigilance
As Riders of Gavony enters, choose a creature type.
Human creatures you control have protection from creatures of the chosen type.

Plains

Phantasmal Image

You may have Phantasmal Image enter as a copy of any creature on the battlefield, except it's an Illusion in addition to its other types and it has "When this creature becomes the target of a spell or ability, sacrifice it."

Chaos Imps

Flying
Unleash (You may have this creature enter with a +1/+1 counter on it. It can't block as long as it has a +1/+1 counter on it.)
Chaos Imps has trample as long as it has a +1/+1 counter on it.

Avenging Arrow

Destroy target creature that dealt damage this turn.

Farbog Explorer

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

Splatter Thug

First strike
Unleash (You may have this creature enter with a +1/+1 counter on it. It can't block as long as it has a +1/+1 counter on it.)

Traveler's Amulet

{1}, Sacrifice Traveler's Amulet: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Serra Avenger

You can't cast Serra Avenger during your first, second, or third turns of the game.
Flying, vigilance

Stonehorn Dignitary

When Stonehorn Dignitary enters, target opponent skips their next combat phase.

Spectral Rider

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)