The extra true damage effect is only applied when units die from the magic damage effect.
Quote upon spell cast: Watch them all die. Does it make you sad?
COST: 15 / 13.25 / 12.5 / 11.75 / 10 per second mana
Activated: Whenever Mona takes damage, she sacrifices Mana to avoid losing health.
Mana sacrifice: 2 / 1.7 / 1.4 / 1.1 / 0.8
Self-buff toggled ability.
The "Mana sacrifice" acts as a multiplier to the damage taken, to determine how much Mana it takes to absorb the entire attack. If Mona doesn't have enough Mana to absorb everything, the uses all the Mana she has left to absorb the most of it.
Quote upon spell cast: I will not suffer.
Silence of Death
COST: 100 / 120 / 140 mana
COOLDOWN: 200 / 180 / 160
Mona silences all allies and enemies in an area.
Silence duration: 3 / 4 / 5 (+0.1% AP)
Every time a champion gets killed, the effect's duration is increased.
Duration increase: 1.5
Mona also recovers life for every 5 basic attacks a single enemy champion takes while affected by this spell.
Heal: 30 / 50 / 70 (+30% AP)
Free cast: this spell doesn't require a target.
Area diameter: 1000
Items or abilities that remove silences also remove Silence of Death's effect.
Quote upon spell cast: Die silent.
Try to catch enemy champions in a crowd of minions, in order to land a much more powerful Breakdown.
Once your team has taken down the enemy marksman while yours is still alive, try to catch the rest of the enemy team packed together for a better Silence of Death.
Regeneration items will not work well for you in combat, try items that grant instant Mana gain such as Mikael's Crucible upon getting a kill of an assist.
Make sure not to wander around near minions Mona can kill in a single Breakdown.
Walking away from Mona is very difficult if she hasn't used Fascination yet.
Focus on the enemy Marksman and keep yours alive, since Silence of Death can make the rest of your team useless while it lasts. You also need to stay alive, so the silence effect wears off in a lesser delay.
Once Mona has used all of her Mana, she loses her Magic Immunity. Use this opportunity to take her down while she is defenseless.