Guilds of Ravnica

Haazda Marshal | Creature | Human Soldier | Whenever Haazda Marshal and at least two other creatures attack, create a 1/1 white Soldier creature token with lifelink. | Josh Hass

Thoughtbound Phantasm | Creature | Spirit | Defender Whenever you surveil, put a +1/+1 counter on Thoughtbound Phantasm. As long as Thoughtbound Phantasm has three or more +1/+1 counters on it, it can attack as though it didn't have defender. | Johann Bodin

Pilfering Imp | Creature | Imp | Flying {1}{B}, {T}, Sacrifice Pilfering Imp: Target opponent reveals their hand. You choose a nonland card from it. That player discards that card. Activate only as a sorcery. | Igor Kieryluk

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