You have a high enough legendary count for Delighted Halfling to count among them, with some bonus counterspell protection
There are plenty of cards like Lychguard and Trazyn the Infinite that encourage you to put things into your graveyard and take them out again
Acidic Slime 6 Some value, some removal security and an annoying body to boot
Some of the sorceries from the Face the Hydra deck might also work, as long as your group is willing to interpret the word Heads as creatures and think of the Chaos Deck as being the Hydra. For example, Unified Lunge would read, Unified Lunge deals X damage to each player, where X is the number of creatures on the battlefield. And Disorienting Glower could be interpreted as, Players cant cast spells until the next time a Chaos Deck card is played . Similarly, you could include some of the sorceries from the Battle the Horde deck by swapping out the word Minotaur for creature. Consuming Rage would then read, Whenever a creature attacks this turn, it gets +2/+0 until end of turn
It wasn't the most impactful set either, with very few cards making a splash in various formats
This follows Lorwyn Eclipsed and will be the first Universes Beyond to have a Draft Night product