Gives 1 additional mana regeneration to all friendly units on the entire map. Each time Crystal casts a spell the mana regeneration is increased for 5 seconds. Doesn't stack.
Effect: increases to 400/600/800/1000% (4/6/8/10), regenerating a total of 20/30/40/50 mana.
Freezes the target in a case of ice, disabling and making it invincible for the duration. Frozen heroes can't earn experience. Instantly kill illusions.
Cooldown: 10 sec.
Casting range: 500
Mana cost: 150
Enchants a enemy hero with a freezing walk, creating a path of low friction ice under his feet. Leaves a trail of frozen ground whenever it goes. Units caught by it, and the target itself, will suffer from low deceleration rate when they are up on the frozen ground. Can only be targeted on enemy heroes. Allied units are unnafected.
Area of effect: 125
Duration: 4/6/8/10 sec.
Cooldown: 12 sec.
Casting range: 700
Mana cost: 160
Causes many random icy explosions in an area surrounding Rylai. Enemy units caught on icy explosions are slowed for 5 seconds. Can be improved by Aghanim's Scepter. Slow units for 30% movement speed and 20% attack speed.
Mana cost: 200(100*)/350(250*)/500(400*)