Kitt Kanto, Mayhem Diva plays into the archetype in a relatively passive way
Invent is going to reward decks that make the game go long and make use of the card advantage and toolbox-y effect that it provides
Based on round-by-round results from the Regional Championships earlier this year and my own observations since then, Izzet Spellementals is favored against Selesnya Offense but is weak against Dimir Excruciator
Unforunately, that ability means that the owner of that Creature has to pay one mana in their upkeep to keep it, otherwise they have to sacrifice it
The Duels series did not feature full sets of Magic cards but selected subsets, and were initially designed to couple a challenging single-player experience with an advanced artificial-intelligence computer opponent
Perfect example of how high end cards are looked through troughly cause I have a feeling a low end card this would have been hit with a 7 instead of a 6