Goblin Dark-Dwellers | Creature | Goblin | Menace
When Goblin Dark-Dwellers enters the battlefield, you may cast target instant or sorcery card with mana value 3 or less from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead. | Steven Belledin
Tyrant of Valakut | Creature | Dragon | Surge {3}{R}{R} (You may cast this spell for its surge cost if you or a teammate has cast another spell this turn.)
Flying
When Tyrant of Valakut enters the battlefield, if its surge cost was paid, it deals 3 damage to any target. | Tyler Jacobson
Jori En, Ruin Diver | Legendary Creature | Merfolk Wizard | Whenever you cast your second spell each turn, draw a card. | Igor Kieryluk
Mina and Denn, Wildborn | Legendary Creature | Elf Ally | You may play an additional land on each of your turns.
{R}{G}, Return a land you control to its owner's hand: Target creature gains trample until end of turn. | Izzy