Thank you for the planeswalker powers list! I'm intrigued by this no-longer-canon song magic of Sorin's. What's the deal there?
@itmecary has a meme for this.
Basically, In the Teeth of Akoum has Sorin’s magic use song (called Rot Talk). So he sings something and something withers and dies. Presumably because of magic and not because his singing is that bad.