Ob Nixilis, the Hate-Twisted 3BB
Legendary Planeswalker -- Nixilis (uncommon)
Whenever an opponent draws a card, Ob Nixilis, the Hate-Twisted, deals 1 damage to that player.
-2: Destroy target creature. Its controller draws two cards.
5 loyalty
Ob Nixilis's Cruelty 2B
Instant (common)
Target creature gets -5/-5 until end of turn. If that creature would die this turn, exile it instead.
Forbidding Spirit 1WW
Creature -- Spirit (uncommon)
When Forbidding Spirit enters the battlefield, until your next turn, creatures can't attack you or planeswalkers you control unless their controller pays 2 for each of those creatures.
3/3
(Name Unknown) U
Creature -- Salamander Drake (uncommon)
Flying 7U: Adapt 4. This ability costs 1 less to activate for each instant and sorcery card in your graveyard.
1/1
If anyone can help translate the name, it would be much appreciated!
Orzhov, Gruul, and Azorius is the only possibility if you want each color to appear exactly twice. Of course, that's a questionable assumption, but seems like a good one to me. I'd bet on Kaya (seems pretty definite due to being shown on the novel cover), Domri (only real candidate), and Dovin (he at least has some tie to Bolas) as the planeswalkers taking them over.
Relentless Advance 3U
Sorcery (common)
Amass 3.
Ob Nixilis, the Hate-Twisted 3BB
Legendary Planeswalker -- Nixilis (uncommon)
Whenever an opponent draws a card, Ob Nixilis, the Hate-Twisted, deals 1 damage to that player.
-2: Destroy target creature. Its controller draws two cards.
5 loyalty
Ob Nixilis's Cruelty 2B
Instant (common)
Target creature gets -5/-5 until end of turn. If that creature would die this turn, exile it instead.
Forbidding Spirit 1WW
Creature -- Spirit (uncommon)
When Forbidding Spirit enters the battlefield, until your next turn, creatures can't attack you or planeswalkers you control unless their controller pays 2 for each of those creatures.
3/3
Senate Guildmage WU
Creature -- Human Wizard (uncommon)
W, T: You gain 2 life.
U, T: Draw a card, then discard a card.
2/2
(Name Unknown) U
Creature -- Salamander Drake (uncommon)
Flying
7U: Adapt 4. This ability costs 1 less to activate for each instant and sorcery card in your graveyard.
1/1
If anyone can help translate the name, it would be much appreciated!
Zhur-Taa Goblin RG
Creature -- Goblin Berserker (Uncommon)
Riot
2/2
Edit: Source seems to be here: https://twitter.com/bmkibler/status/1080899349314293760
Edit: Source seems to be here: https://www.youtube.com/watch?v=uzMZJhca9Uo
Anyone have any idea what the flavor text says, by any chance?