December 16, 2015 Patch (Test)

{{Patch layout
 * game = test
 * sort = 2015-12-16
 * source = http://dev.dota2.com/showthread.php?t=186442
 * source-title = Update 4
 * source2 = http://dev.dota2.com/showthread.php?t=186516
 * source2-title = Update 5
 * source3 = http://dev.dota2.com/showthread.php?t=186529
 * source3-title = Update 6
 * before = December 15, 2015 Patch (Test)
 * after = March 22, 2016 Patch (Test)
 * notes =

Update 4

 * Fixed some performance issues
 * Fixed hitting units in Fog of War
 * 's now resets cooldown times correctly when purged
 * Added Cast Range to the tooltip of
 * Fixed not applying  when using a stolen  with
 * Fixed some map exploits with Ironwood Trees around Roshan and the Fountain
 * 's intelligence steal via now creates a single buff/debuff showing the amount of intelligence stolen rather than multiple individual buffs/debuffs
 * Fixed various missing tooltips
 * Fixed with

Update 5

 * Updated Legacy Keys for on Spirit Bear
 * Fixed tooltip on
 * Renamed to
 * Fixed and  Maim debuff going through Spell Immunity
 * Fixed fountain healing buff missing an icon
 * Fixed not being listed as a  hero
 * Fixed minor terrain clipping issues
 * Fixed server crash when attacking a dead unit with
 * Fixed being able to upgrade  four times
 * Fixed the interaction of 's and
 * Fixed the interaction of 's with  and very high attack speeds
 * Fixed a bad pathing interaction with some new juke spots
 * Fixed  incorrectly showing a range indicator
 * Fixed a bug where certain effects would cause the screen to shake even if the option was disabled (such as 's )
 * Fixed non-ultimates always displaying tooltips, even when you didn't have  (like )
 * Fixed targeted max-range channels breaking if the target unit moved towards the channeler
 * on Spirit Bear is now always in the third slot, regardless of bear level
 * Fixed 's 's Buff not transferring to the
 * Fixed always commenting on the last item purchased
 * Fixed affecting non-player controlled creeps
 * Fixed and  interactions with
 * Fixed cursor range indicator not taking into account
 * Added a cooldown display for the fade time of 's
 * Fixed the range indicator incorrectly being extended by on attack abilities and on AOE abilities

Update 6
}}
 * now prioritizes units over trees when both are clickable
 * Fixed 's visual not updating properly with
 * Fixed the interaction of using s on trees after a ward or ironwood tree
 * Fixed a bug which caused dead units to be instantly deselected
 * Fixed a bug which prevented player-controlled units from starting to auto-attack when units entered their attack range when the attack range was very large
 * Added AoE display to 's and
 * Fixed Arcane Rune and interaction
 * Fixed a bug in the UI where units affected by would display their original move speed
 * Fixed Roshan attack animation bug
 * now works if used right after skilling
 * Fixed not being affected by
 * Added range display to 's and
 * 's is now affected by
 * Fixed some neutral creep sound bugs
 * 's cooldown now updates correctly as it's leveled up, and is no longer affected by
 * Fixed a bug where the AOE circle wouldn't appear when casting a spell if the ability rangefinder is enabled