Cannot be Normal Summoned or Set. Must first be Special Summoned (from your hand) by banishing 3 Dragon-Type Normal Monsters in your Graveyard. Once per turn: You can banish 1 Dragon-Type monster from your Graveyard to target 1 card on the field; destroy that target.
Summoning Hieratic Dragon of Sutekh already requires banishing 3 Normal Dragon-type monsters. And on top of that you get to banish 1 Dragon-type monster in your graveyard every turn to activate his effect. This could lead to accumulating many counters on Chaos Zone turning it into an effective search engine.
Normal Dragon-type monsters
Here is a list of Normal Dragon-type monsters you can use to special summon Hieratic Dragon of Sunkeht and/or activate his destruction effect. You can also use Gemini Dragon-type monsters because they are treated as Normal monsters in the graveyard.
Hieratic Seal from the Ashes is a great way to get this card onto the field by sending Hieratic Seal of the Sun Dragon Overlord and Hieratic Seal of the Dragon King to the graveyard. Additionally, it returns your removed from play Hieratic monsters to the graveyard providing fuel for your destruction effect every turn.