I hope Wizards will produce something in the near future, but Im not holding my breath
Mentor Magic has had a host of mechanics that encourage aggression
Doran, the Siege Tower The following things are all true at the same time of Doran, which if you look at nearly every other conceivable Magic card, seems impossible: It shows something about the world it belongs to, it has an intriguingly "different" mana cost and p/t, it demonstrates a never-then-before-seen ability with very few words, and finally the flavor text effortlessly ties the smile-inducing ability, the nature of the character, and its application to our real lives
Academy ManufactorAcademy Manufactor (147,608 Inclusions, 4% of 4,046,881 Decks) Amazing as Academy ManufactorAcademy Manufactor is getting for Treasure and Tri-Token decks these days with all the new Clue, Food, and Treasure support, that's just not what we're doing today