I feel blood artist is fairly lame in the deck with such a low creature count. Even when you killing wave with multiple artist out, it seems like you be better off cutting both artist and wave and running something like finks or messanger. Also, vraska is too slow for modern, it would probably be better as a 4cmc garruk, or more removal
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Thanks to Rivenor for the signature and XenoNinja for the Avi!