Dominaria

Ghitu Journeymage | Creature | Human Wizard | When Ghitu Journeymage enters the battlefield, if you control another Wizard, Ghitu Journeymage deals 2 damage to each opponent. | Jason Rainville

Goblin Chainwhirler | Creature | Goblin Warrior | First strike When Goblin Chainwhirler enters the battlefield, it deals 1 damage to each opponent and each creature and planeswalker they control. | Svetlin Velinov

Goblin Warchief | Creature | Goblin Warrior | Goblin spells you cast cost {1} less to cast. Goblins you control have haste. | Karl Kopinski

Keldon Overseer | Creature | Human Warrior | Kicker {3}{R} (You may pay an additional {3}{R} as you cast this spell.) Haste When Keldon Overseer enters the battlefield, if it was kicked, gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. | Jason A. Engle

Squee, the Immortal | Legendary Creature | Goblin | You may cast Squee, the Immortal from your graveyard or from exile. | Svetlin Velinov

Valduk, Keeper of the Flame | Legendary Creature | Human Shaman | At the beginning of combat on your turn, for each Aura and Equipment attached to Valduk, Keeper of the Flame, create a 3/1 red Elemental creature token with trample and haste. Exile those tokens at the beginning of the next end step. | Victor Adame Minguez

Adeliz, the Cinder Wind | Legendary Creature | Human Wizard | Flying, haste Whenever you cast an instant or sorcery spell, Wizards you control get +1/+1 until end of turn. | Zezhou Chen

Hallar, the Firefletcher | Legendary Creature | Elf Archer | Trample Whenever you cast a spell, if that spell was kicked, put a +1/+1 counter on Hallar, the Firefletcher, then Hallar deals damage equal to the number of +1/+1 counters on it to each opponent. | Bram Sels