EDIT 5/28: Banlist slightly touched deck. Diablosis banned so no more full combo, Ariseheart to 1, and Unicorn to 2 hurts consistency, but this deck's still gonna be baller. Will make a new list later, leaving this one up for posterity.
Pretty straightforward Kashtira deck. Running basic Kashtira ratios, as many copies of Wraitsoth as possible to go into the Unicorn combo. Garura, Infinitrack Goliath, and Skull Knight are your Prosperity fodder, dump those and try to equip Arise-Heart with Goliath to give it destruction immunity. Baronne is easily summoned with any of your Kashtira main decks and a Normal Summoned Ash if you managed to make a good board without needing to use your Normal Summon. Side Deck is based around going second, I'm not 100% sure about side deck but the main is honestly solid by itself - just swap out whatever you need.