Here is another Babbling Book Mage deck. This is the CosplayGrill Babbling Book Tempo Mage Deck he was playing on stream and when I was watching he was in top 5 Legend ranks, which is pretty insane so soon after the release of the new card.
I prefer this over the Reynad Babbling Book Mage list. It makes sense to have the Emperor Thurissan and Archmage Antonidas and slow the game down a little.
You can control the board early and reduce a load of spells to do some crazy Archmage turns or just burn away with Flamewakers.
Mulligan Guide for Babbling Book Tempo Mage
Mulligan for those cheap early removal spells, 2 drops, and the Babbling Book. You can drop Babbling Book at any point in the game, the spell is random.