Boros Challenger

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)
{2}{R}{W}: Boros Challenger gets +1/+1 until end of turn.

Daggerback Basilisk

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Gearsmith Guardian

Gearsmith Guardian gets +2/+0 as long as you control a blue creature.

Plains

Greenwood Sentinel

Vigilance (Attacking doesn't cause this creature to tap.)

Angel of the Dawn

Flying
When Angel of the Dawn enters, creatures you control get +1/+1 and gain vigilance until end of turn.

Dragon Egg

Defender
When Dragon Egg dies, create a 2/2 red Dragon creature token with flying and "{R}: This creature gets +1/+0 until end of turn."

Viashino Pyromancer

When this creature enters, it deals 2 damage to target player or planeswalker.

Gallant Cavalry

Vigilance (Attacking doesn't cause this creature to tap.)
When Gallant Cavalry enters, create a 2/2 white Knight creature token with vigilance.

Forest

Skyscanner

Flying
When Skyscanner enters, draw a card.

Crash Through

Creatures you control gain trample until end of turn. (Each of those creature can deal excess combat damage to the player or planeswalker it's attacking.)
Draw a card.

Elvish Clancaller

Other Elves you control get +1/+1.
{4}{G}{G}, {T}: Search your library for a card named Elvish Clancaller, put it onto the battlefield, then shuffle.

Gargoyle Sentinel

Defender (This creature can't attack.)
{3}: Until end of turn, Gargoyle Sentinel loses defender and gains flying.

Havoc Devils

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Naturalize

Aegis of the Heavens

Target creature gets +1/+7 until end of turn.

Marauder's Axe

Equipped creature gets +2/+0.
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Hostile Minotaur

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

Shock

Mountain

Druid of the Cowl

Root Snare

Prevent all combat damage that would be dealt this turn.

Smelt

Sarkhan, Fireblood

+1: You may discard a card. If you do, draw a card.
+1: Add two mana in any combination of colors. Spend this mana only to cast Dragon spells.
−7: Create four 5/5 red Dragon creature tokens with flying.

Reliquary Tower

You have no maximum hand size.
{T}: Add {C}.

Rustwing Falcon

Rogue's Gloves

Whenever equipped creature deals combat damage to a player, you may draw a card.
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Aethershield Artificer

At the beginning of combat on your turn, target artifact creature you control gets +2/+2 and gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Vigilant Baloth

Thorn Lieutenant

Whenever Thorn Lieutenant becomes the target of a spell or ability an opponent controls, create a 1/1 green Elf Warrior creature token.
{5}{G}: Thorn Lieutenant gets +4/+4 until end of turn.