This is a budget version of singing serpents. I've kept magnus and sapo as they are essential mythics, and it's still got a lot of rares but it should be much cheaper than the original list while working similarly. To build towards the full list (https://www.mythgardhub.com/deck?id=1405) you can do the following :
Wonder drug => Twin 1 (priority)
Blackened jotun => Braggi (priority)
Earthslide => Twin 2 (important)
Blackened jotun => Kara (important)
Wonder drug => Satellite (if the meta is too aggressive, the spot for the second misanthropia can be a one of drug, as can be this spot if the meta doesn't ask for supress)
Cairnhenge => Odinthrone (non-essential)
Misanthropia => Xelhua (non essential, second misanthropia can be right depending on the meta, zolea is an option too)
Rune of denial => Loki's veil (non-essential)
I wrote an article for kryptik gaming about the deck which should help you pilot it : https://kryptikgaming.wixsite.com/mythgard/articles/by-rainbow-control-singing-serpents