There are now five (5) types of tokens you can trade in.
The Almirian Seal and Jelly Gem we’ve seen before but there are now three more: Primal Spark, Grim Spark, Forge Spark.
My guess:
The Primal Spark sounds “beast like” to me, so I’m guessing a large wolf-man type creature.
The Grim Spark sounds “undead” to me, so I’m guessing a large zombie.
The Forge Spark sounds “metal” to me, I’m guessing a large mechanical.
There are no new bosses. The new token types appear to drop randomly from red crates.
I obtained one primal spark and two grim sparks in the 9 floors I ran today, so they are not terribly rare.