The psionist's presence blows other heroes minds: more they stay close, more psionic presence charges they get. Each level of this skill has a number of charges required for this skill to trigger.
So for example: at lvl 3 this skill will automatically trigger on each nearby hero that has at least 30 charges on him. This will burn 80 mana from the psionist and each enemy hero will get one of the 3 possible negative effects for 4s.
Mana cost at trigger per level : 50/ 70 / 80 / 90
Charges required per level : 60 / 50 / 30 / 10
Charges per second close to psionist : 2
Pool of negative effects applied :
Level 1 : decrease attack speed
Level 2 : decrease attack speed , decrease magic armor
Level 3 : decrease attack speed , decrease magic armor , damage over time
Level 4 : decrease attack speed , decrease magic armor , damage over time , silence
Negative effect duration: 3s / 4s/ 5s/ 6s
The duration scales with levels while effects don't change:
Decrease attack speed : -10 attack speed
Decrease magic armor : -5 magic armor
Damage over time : 40 damage per second
Silence