Glaciate.

Level 9 Conjuration/Ice; generates a cone-shaped great blast of ice
around a specified target. The minimum range of the cone is 3, and the
maximum is LOS at maximum spellpower; damage within a minimum-range cone
is equivalent to Ice Storm, and falls off with the square of the distance
for larger cones.

Leaves freezing clouds over the affected area, like Ice Storm; they
dissipate really quickly over large areas, though.

Targets hit with Glaciate are flash-frozen; they are subject to slow
movement for three turns.

Targets killed with Glaciate have a 3/5 chance of becoming a block of
ice (similar to a pillar of salt).

Also contains a monster-castable version of the spell.

Replaces Ice Storm; most of Ice Storm's code disappears (ZAP_ICE_STORM is
TAG_MAJOR_VERSION == 34'd out). Go fight Lom Lobon to see the monster
version.

Large chunks of this either originate from a patch from Keanan Smith
(Siegurt), seen at https://crawl.develz.org/mantis/view.php?id=7760, or
from the following discussion on Tavern:
https://crawl.develz.org/tavern/viewtopic.php?f=8&t=9854

1 files changed, 2 insertions, 0 deletions

diff --git a/crawl-ref/source/zap-data.h b/crawl-ref/source/zap-data.h
index 265fb59069..920fb5c80c 100644
--- a/crawl-ref/source/zap-data.h
+++ b/crawl-ref/source/zap-data.h
@@ -759,6 +759,7 @@ struct zap_info
     4
 },
 
+#if TAG_MAJOR_VERSION == 34
 {                           // ench_power controls radius
     ZAP_ICE_STORM,
     "great blast of cold",
@@ -774,6 +775,7 @@ struct zap_info
     true,
     9 // XXX: Should a storm be louder?
 },
+#endif
 
 {
     ZAP_CORONA,