Best team for Selena in ML Adventure are: Selena + Lancelot + Clint + Hylos + Estes.
For 6s, charm 2 undetermined enemy units. They acquire an Abyssal Mark and sustain damage equivalent to 150% of her Attack every second while captivated. By casting it a second time, Selena transforms into an abomination, substantially enhancing her agility and lifesteal. The damage from Selena’s Ultimate now deals AoE damage and leaves Abyssal Marks on the victims.
Send out two Abyssal Devils at random, who when they fly over and take control of an ally hero, increasing their attack by 25% and critical chance by 25% for five seconds. The Abyssal Devils do damage equal to 100% of Selena’s Attack per second for 5 seconds when flying over opposing heroes instead. Selena additionally gets an increase in attack and critical chance if she uses it while in abyssal form.
To deliver damage to the opponent unit with the lowest HP percentage, summon an Abyssal Devil to attack it for 375 percent of Selena’s Attack damage. While in Abyssal Form, Selena can use this skill to rush over to the opponent unit with the lowest HP and repeatedly deliver damage equivalent to 100% of her Attack.
Each 2 seconds, units with abyssal mark receive damage equal to 5% of their maximum health. Selena regenerates HP equivalent to the target’s lost HP, and this effect has a ceiling of 500% of her attack power.