It's more of a classic than Mind's Eye because you can kill tokens or X/1 dorks to draw, trigger death triggers like Blood Artist and draw all day long
I hate to be constantly coming down on the side of "generically good", but until we're giving out points for somehow making skinless, multi-legged critters cute and functional, I think this one has to go to Soul-Guide LanternSoul-Guide Lantern and artifacts
At the cost of only one mana, Thoughtseize gives you the ability to get rid of a problematic card in your opponents hand, while also granting you valuable information about how to approach the subsequent turns
Each of the Sol Rings will feature Elvish written on them, while The One Ring features Mordors Black Speech
Same total mana value, and they both dish out counters when they attack, though Expanding Ooze needs a modified creature to target