Each set has something specific you can look for to work your way through the revised MTG forensic ID flowchart to correctly identify just what youre looking at: The chart essentially goes through a checklist in order of border color, the date on the card (if any), and the language the card is in
I think Ayara, First of Locthwain might be too much a holdover from the Bastion of Remembrance versions of this deck, and cutting that card and the sideboard splash of Tibalt, Cosmic Impostor lets you play all Snow-Covered Swamps and a couple of copies of Faceless Haven
Cards like Dive Down, Mizzium Skin, and Shell Shield not only stop targeted removal, but they can be used to copy other creatures in a pinch
This card works best when paired with many Songs as any time you play a Song card, you can pay two ink and deal three damage to a character of your choosing
Here are the percentages: Five commons, one uncommons will happen 35% of the time