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

Calculating dependencies ... done!
Dependency resolution took 0.98 s (backtrack: 0/20).

[ebuild  N     ] dev-perl/Math-Random-ISAAC-1.4.0-r2::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 34 KiB
[ebuild  N     ] dev-perl/Math-Random-ISAAC-XS-1.4.0-r3::gentoo  USE="-examples -minimal -test" PERL_FEATURES="ithreads (-debug) -quadmath" 72 KiB

Total: 2 packages (2 new), Size of downloads: 106 KiB