[v2.2.7]
* 'Invasion' System
> A monster has a low chance to invade on Hard difficulty or higher (Standard, Tower of Silence).
> Defeating the invading monster grants a Worldtree Leaf or Legendary equipment + Blue Elixir or Stone (Hell difficulty or higher).
* Added 1 new achievement.
* Increased ManaStone ad reward: 1.5x > 2x.
* Fixed some incorrect tooltips.