Guilds of Ravnica

Goblin Banneret | Creature | Goblin Soldier | Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.) {1}{R}: Goblin Banneret gets +2/+0 until end of turn. | Viktor Titov

Maximize Velocity | Sorcery | | Target creature gets +1/+1 and gains haste until end of turn. Jump-start (You may cast this card from your graveyard by discarding a card in addition to paying its other costs. Then exile this card.) | Svetlin Velinov

Torch Courier | Creature | Goblin | Haste Sacrifice Torch Courier: Another target creature gains haste until end of turn. | Mark Zug

Integrity | Instant | | Target creature gets +2/+2 until end of turn. | Ben Maier