diff -Naurb nethack-3.4.3/include/rm.h nethack-nymph/include/rm.h
--- nethack-3.4.3/include/rm.h	2003-12-08 10:39:13.000000000 +1100
+++ nethack-nymph/include/rm.h	2005-03-29 13:14:23.000000000 +1000
@@ -261,6 +261,7 @@
  */
 #define TREE_LOOTED	1
 #define TREE_SWARM	2
+#define TREE_NYMPH	4
 
 /*
  * Fountains have limits, and special warnings.
diff -Naurb nethack-3.4.3/src/dokick.c nethack-nymph/src/dokick.c
--- nethack-3.4.3/src/dokick.c	2003-12-08 10:39:13.000000000 +1100
+++ nethack-nymph/src/dokick.c	2005-03-29 13:22:54.000000000 +1000
@@ -919,7 +919,12 @@
 			newsym(x, y);
 			maploc->looted |= TREE_LOOTED;
 			return(1);
-		    } else if (!(maploc->looted & TREE_SWARM)) {
+		    } else {
+			boolean swarm = !(maploc->looted & TREE_SWARM);
+			boolean nymph = !(maploc->looted & TREE_NYMPH);
+
+			if (swarm && nymph) swarm = (rn2(100) < 50);
+			if (swarm) {
 		    	int cnt = rnl(4) + 2;
 			int made = 0;
 		    	coord mm;
@@ -937,6 +942,21 @@
 			maploc->looted |= TREE_SWARM;
 			return(1);
 		    }
+			else if (nymph) {
+			    coord mm;
+			    mm.x = x; mm.y = y;
+			    
+			    if (enexto(&mm, mm.x, mm.y, &mons[PM_WOOD_NYMPH])) {
+				mtmp = makemon(&mons[PM_WOOD_NYMPH],
+					       mm.x, mm.y, MM_ANGRY);
+
+				You("awake the spirit of the tree!");
+				/* Never asleep */
+				mtmp->msleeping = 0;
+				maploc->looted |= TREE_NYMPH;
+			    }
+			}
+		    }
 		    goto ouch;
 		}
 #ifdef SINKS