Here is my input (while late to the game). As always the graphics guy has done an awesome job, and my image input is just nitpicky stuff from my point of view.
Set icon could be a little more distinctive, it's really close to two former set icons. In a bin
UR's
• Death Flail:
○ I like this change
• Charm of quick strike:
○ I like the change to Charm
• Charm of Spell Swaping:
○ Img - the magic lightning is similar to UR background effects and blends in, the image might pop more by enhancing it. Maybe White in the middle instead of the blue. Like Dark Disciple's Shirt but bolder.
• Cloak of the Shadowskin:
○ Img - Horizontal flip the cloak so it's angle complements the curve of the token.
• Ioun Stone of Gold Nugget:
○ I see what you did there
○ Img - Great Job!! Nice and crisp, and I like that not every UR's img is purple.
• Lute of fury
○ Img - Would be cool if it was shooting off some white fireworks out of the neck.
• Ring of the Yeti
○ Img - at a quick glance it's too similar to the other UR ring and is hard to tell apart in the dark. I'd swap the text and graphic, and then horizontally flip the graphic. So the ring is on the opposite side of the token than the other ring. (I know it's the norm for the text to be on the right side)