Bel is the leader in Avernus, but the MM says Zariel. Which is correct?

Is this the end of weekly Unearthed Arcana?

What’s the narrative difference between Oathbreaker and Oath of Treachery?

How is the Saving Throw DC for the Conquering strike ability calculated?

UA Paladin: these paladins still deal Radiant damage with Divine Smite, right?