You are looking at a black sapphire
The closer you get to the gem, the more the room around you seems to darken. In fact, you're not even sure if the sapphire is black, or if it is merely the fact that no light reaches it.
Code
##tickloc: runsub checkstuff; ##checkstuff: $lichsoul = 88101; $lhlthm = $lichsoul's healthmax; $lhlth = $lichsoul's health; $shlth = $actor's health; $shlthm = $actor's healthmax; if $shlth > 0 then regensap else shattersap; ##goahead: $lichsoul = 88101; $mat = $lichsoul's material; swap $mat add "_undead_"; swap $mat add "_undlich_"; set $lichsoul's material to $mat; ##regensap: if $shlth < $shlthm then doregen else nope; ##doregen: add 3 to $shlth; set $actor's health to $shlth; ##shattersap: print "A piercing shriek splits as the cloud of darkness around [$actor] seems to collapse in on itself." print "[$actor] explodes into thousands of shards, and tendrils of darkness seem tear at you as they disappate into the air." $matl = $lichsoul's material; swap $matl take "_undlich_"; set $lichsoul's material to $matl; ##cursenow: