These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.00 s (backtrack: 0/20).

[ebuild  N     ] acct-group/gamestat-0-r3::gentoo  0 KiB
[ebuild  N     ] x11-apps/bdftopcf-1.1.2::gentoo  143 KiB
[ebuild  N     ] games-roguelike/nethack-3.6.7::gentoo  USE="X" 5447 KiB

Total: 3 packages (3 new), Size of downloads: 5590 KiB