Spam structures and big energy creatures on your board, pumps/coils and lots of removal keep the enemy board clear.
Kills mostly through big creatures (Cannon, Giant, Harvester) and direct idol damage. Don't get caught up too much with beetle stone spam.
You can probably switch out Cluster Hex and Mire Curse for some other removal.
I checked 'needs Wild', but you don't have to; 1-2 successful Darkstrikes and 1-2 Decay sacs will allow you to play each of the Decay scrolls in here, though ramping to 4 decay + wild is advisable for best beetle stone spam.
Disclaimer: This deck is horrible. It doesn't really live up to its idea, and it has shitty scrolls in it for the extremely simple reason that I didn't have and good scrolls when I made it. I won't update it, and the only reason it's even here is so people can point and laugh at me.