Grandaddy mass recast, from times before this was properly divied up among the color pie. Yawgmoth's Will is a storied Reserve list rare. Eternal Masters is giving the Reserved list an alarming boost, but not all at once. Keep riding these waves, they won't last.
No-brainer. Get enough for play. Great long-term investment, but a guaranteed short-term windfall.
This will stay relevant as long as Legacy does. Popping to $60, falling to $35-$40, hanging there for at least a short time. Going up, not coming back. $80+ in 5 years.