match basic death sight explanation

Any spell involving Death Sight might be printed on its own, so it seems
best to print a brief overview of the effect in every spell which does
this.

spells/Death2.tex

@@ -52,9 +52,7 @@
   {
     The caster stares into a middle distance continuously, until they find a special state of de-focussing their eyes which lets them (or a target) see as the dead see.
     They no longer see normal light, but instead see only the light of souls.
-
-    All sentient creatures -- elves, gnomes, woodspies -- light up the world like a small sun.
-    However, the vision becomes indistinct beyond \spellRange -- the target understands nothing more than `something might live over there', and any life around them quickly distorts that limited vision.
+    However, the vision becomes indistinct beyond \spellRange\ -- the target understands nothing more than `something might live over there', and any life around them quickly distorts that limited vision.
 
     For as long as the spell remains active, the target cannot regenerate \glspl{fatigue}, \glspl{mp}, or \glspl{hp}.
   }

spells/Death3.tex

@@ -17,8 +17,7 @@
   {Gain \gls{dr} 2, ignore up to \arabic{spelllevel}~\gls{fatigue} penalties, and see as the dead see}% Description
   {
     The target no longer sees normal light, but instead only the light of souls.
-
-    Vision remains detailed up to \spellRange.
+    However, the vision becomes indistinct beyond \spellRange\ -- the target understands nothing more than `something might live over there', and any life around them quickly distorts that limited vision.
 
     For as long as the spell remains active, the target cannot regenerate \glspl{fatigue}, \glspl{mp}, or \glspl{hp}.
   }