Mark Leda's as useless when it can't be cast (#7221).

The prerequisites are that the player's standing on solid ground and
that the ground's not already liquefied, which are mirrored in the
uselessness check.

1 files changed, 10 insertions, 0 deletions

diff --git a/crawl-ref/source/spl-util.cc b/crawl-ref/source/spl-util.cc
index 1cad065c0e..4265b8144d 100644
--- a/crawl-ref/source/spl-util.cc
+++ b/crawl-ref/source/spl-util.cc
@@ -17,6 +17,7 @@
 
 #include "externs.h"
 
+#include "areas.h"
 #include "beam.h"
 #include "coord.h"
 #include "coordit.h"
@@ -1179,6 +1180,15 @@ bool spell_is_useless(spell_type spell, bool transient)
             return true;
         break;
 
+    case SPELL_LEDAS_LIQUEFACTION:
+        if (!you.stand_on_solid_ground()
+            || you.duration[DUR_LIQUEFYING]
+            || liquefied(you.pos()))
+        {
+            return true;
+        }
+        break;
+
     default:
         break; // quash unhandled constants warnings
     }