Trying to build the port I'm receiving the following error (on amd64 - 13.3-STABLE):
===>  Building for NBlood-r13984
gmake[1]: Entering directory '/usr/ports/games/NBlood/work/NBlood-r13984'
clang++: warning: argument unused during compilation: '-fuse-ld=lld' [-Wunused-command-line-argument]
In file included from source/blood/src/blood.cpp:23:
In file included from source/build/include/build.h:22:
In file included from source/build/include/collections.h:7:
In file included from source/build/include/compat.h:481:
In file included from /usr/include/c++/v1/functional:526:
In file included from /usr/include/c++/v1/__functional/boyer_moore_searcher.h:27:
In file included from /usr/include/c++/v1/vector:321:
In file included from /usr/include/c++/v1/__format/formatter_bool.h:20:
In file included from /usr/include/c++/v1/__format/formatter_integral.h:32:
/usr/include/c++/v1/locale:2822:22: error: no member named 'mi_realloc' in namespace 'std'; did you mean simply 'mi_realloc'?
 2822 |     _Tp* __t = (_Tp*)std::realloc(__owns ? __b.get() : 0, __new_cap);
      |                      ^~~~~
source/mimalloc/include/mimalloc.h:111:40: note: 'mi_realloc' declared here
  111 | mi_decl_nodiscard mi_decl_export void* mi_realloc(void* p, size_t newsize)      mi_attr_noexcept mi_attr_alloc_size(2);
      |                                        ^
1 error generated.
Failed building obj/blood/blood.o from source/blood/src/blood.cpp!
gmake[1]: *** [GNUmakefile:1452: obj/blood/blood.o] Error 1
gmake[1]: Leaving directory '/usr/ports/games/NBlood/work/NBlood-r13984'
*** Error code 1

Stop.
make: stopped in /usr/ports/games/NBlood