Arcee, Sharpshooter does require a counter on it to transform to Arcee, Acrobatic Coupe
The rares and mythics of Modern Masters are usually aimed at Modern Constructed
Creature Artifact - Construct Myr Oswald Fiddlebender Magical Tinkering , , Sacrifice an artifact: Search your library for an artifact card with mana value equal to 1 plus the sacrificed artifact's mana value, put it onto the battlefield, then shuffle
Starlight Vial Item Starlight Vial seems like a cool card, but ultimately Im not seeing the return on investment in including this costly uninkable in your deck
With the help of Amulet of Vigor and the so-called bounce lands, Primeval Titan can be cast as early as turn two, instantly ramping you up to four mana and running away with the game