Diabolist is a Magic affinity rare from the Demonspawn faction. She will be one of the champions you end up getting more than any other as she is farmable from Campaign Stage 12: Brimstone Path and this is where you will spend most of your time farming experience to level champions.
Diabolist is a great rare with turn meter boosting for your team and the ability to decrease enemy turn meter. I like to run Diabolist in a Stun set to give more control over the waves you are facing. This is especially good in Faction Wars where she still becomes a part of my level 21 team ahead of a lot of legendary champions!

Attacks 1 enemy. Has a 10% chance of placing a Sleep places for 1 turn.
Level 2: Damage +5%
Level 3: Damage +5%
Level 4: Damage +5%
Level 5: Buff/Debuff Chance +5%
Level 6: Buff/Debuff Chance +5%

Attacks all enemies. Places a 30% Increase SPD buff on all allies for 2 turns.
Level 2: Damage +5%
Level 3: Damage +5%
Level 4: Cooldown -1

Fills the Turn Meter of all allies by 15%. Decreases the Turn Meter of all enemies by 15%.
Level 2: Cooldown -1
Level 3: Cooldown -1

PVE Masteries

PVP Masteries