Hieratic Dragon King of Atum is great due to the addition of the Bystial monsters, and its effect is another combo extension through its Special Summon effect
At the end of the Damage Step, if this card attacked: Destroy all monsters your opponent controls
If you like slinging spells and killing opponents quickly, I'd definitely recommend it as a solid budget option, although the fact that our creatures are pretty fragile might keep it from being a legitimate top-tier option in Standard
This is ideal for players who enjoy drafting, but Constructed players should steer clear
(1) When this card, or a Kuriboh monster you control, is destroyed by battle: You can Special Summon 1 monster with 300 ATK/200 DEF from your Deck, except Kuribah
Still, its likely worth the risk