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

Calculating dependencies ... done!
Dependency resolution took 0.99 s (backtrack: 0/20).

[ebuild  N     ] acct-group/pdnsd-0-r3::gentoo  0 KiB
[ebuild  N     ] acct-user/pdnsd-0-r3::gentoo  0 KiB
[ebuild  N     ] net-dns/pdnsd-1.2.9a-r2::gentoo  USE="ipv6 urandom -debug -test" 504 KiB

Total: 3 packages (3 new), Size of downloads: 504 KiB