Since the best cards with infect are Phyrexian, and Golgari (black/green) has some of the best colors for infect, Glissa makes for a fantastic choice
Accordingly, and will phase in with Bear

Abomination, Irradiated Brute Adrix and Nev, Twincasters Aether Refinery Ageless Entity Amy Pond Angel of Suffering Angelheart Vial Angelic Aberration Anointed Procession Ant-Man, Elusive Avenger Anti-Venom, Horrifying Healer April, Reporter of the Weird Arcee, Acrobatic Coupe Archfiend of Spite Arco-Flagellant Arjun, the Shifting Flame Art Appreciation Ashiok, Wicked Manipulator Atomwheel Acrobats Augusta, Order Returned Auntie Blyte, Bad Influence Aurora Shifter Aveline de Grandpr Awaken the Erstwhile Bamboozling Beeble Barbara Wright Barbarian Class Barbed Shocker Barrowgoyf Basri Ket Belltower Sphinx Benevolent Hydra Bioessence Hydra Bloatfly Swarm Blood Hound Bloodspore Thrinax Bloodthirsty Adversary Body of Knowledge Book Devourer Bottle-Cap Blast Braids's Frightful Return Branching Evolution Brass's Tunnel-Grinder Broodhatch Nantuko Bruvac the Grandiloquent By Invitation Only Caldera Hellion Caprichrome Captain N'ghathrod Caradora, Heart of Alacria Cathartic Pyre Cavalier of Flame Celes, Rune Knight Cephalid Constable Chandra, Flamecaller Chandra, Legacy of Fire Chaos Balor Chatterfang, Squirrel General Choco, Seeker of Paradise Choice of Damnations Chorus of the Conclave Cold-Eyed Selkie Collective Defiance Colossus of the Blood Age Conclave Mentor Conclave Sledge-Captain Corpsejack Menace Corpsejack Menace Credit Voucher Crosstown Courier Crumbling Sanctuary Cryptcaller Chariot

The new My Little Pony -themed MTG gear, which, naturally, has been dubbed Ponies: The Galloping, will be available in two bundles
Just put one in the board and wish for it
You can pay three mana to give all of your creatures +1/+0 until the end of the turn, but the main ability is that Purphoros will deal two damage to each opponent every time a creature enters on your side of the battlefield