This seems to have largely flown under the radar, but yesterday WotC gave us a list of cards which are going to be added to Magic Arena a week from now for the Historic format. The cards are:
[draft]Serra Ascendant
Soul Warden
Kinsbaile Cavalier
Treasure Hunt
Distant Melody
Cryptbreaker
Hypnotic Specter
Phyrexian Arena
Tendrils of Corruption
Kiln Fiend
Goblin Matron
Hidetsugu’s Second Rite
Elvish Visionary
Fauna Shaman
Imperious Perfect
Burning-Tree Emissary
Captain Sisay
Ornithopter
Mind Stone
Darksteel Reactor[/draft]
