Improvements

• Reworked on quest 'Attrition Warfare'. Now the quest is easier to be finished；

• Fixed some conflicts between quests and steam achievements

Bug Fixes

• Fixed a bug where buff animation may not be played correctly after Terrain Reshape；

• Improved Undo system. Now Champions with movement skills are correctly located after flashing back；

• Fixed a bug where terrain image is displayed incorrectly after reshaping