As a five-drop, the Avatar Horror has decent stats, although no keywords like Balemurk
The only real splurges in a tuned list are Death Baron and Lord of the Undead, both optional

Discard one "Shadow the Hedgehog," then do one of the following: -Banish one "Chaos Emerald: Red," one "Chaos Emerald: Blue," one "Chaos Emerald: Green," one "Chaos Emerald: Purple," one "Chaos Emerald: Yellow," one "Chaos Emerald: White," and one "Chaos Emerald: Cyan" from your Graveyard, and Fusion Summon one "Super Shadow the Hedgehog." -Banish one "Master Emerald" from the Graveyard, and Fusion Summon one "Super Shadow the Hedgehog." Discard one "Sonic the Hedgehog," then do one of the following: -Banish one "Chaos Emerald: Red," one "Chaos Emerald: Blue," one "Chaos Emerald: Green," one "Chaos Emerald: Purple," one "Chaos Emerald: Yellow," one "Chaos Emerald: White," and one "Chaos Emerald: Cyan" from your Graveyard, and Fusion Summon one "Super Sonic the Hedgehog." -Banish one "Master Emerald" from the Graveyard, and Fusion Summon one "Super Sonic the Hedgehog." When this card is Special Summoned, send one "Chaos Emerald" card from your Deck to your Hand

Bruvac the Grandiloquent Bruvac the Grandiloquent is here to make all of your other mill cards even better
Two of each may seem low to those familiar with Atarka Red, but with all the card draw you see a larger portion of your deck than before