Duration
Durations can be decreased at the end of both your own and the enemy's turn. When an effect's duration is decreased, depends on whether the effect is considered useful. Effects useful on your turn are for example damage, healing and allow effects. The durations of these effects are decreased at the end of your turn. Effects useful on the enemy turn are for example stuns, invulnerabilities and damage reductions. The durations of these effects are decreased at the end of the enemy's turn.
Durations in Skill Descriptions
The duration of each effect in a skill is mentioned in the skill's descritption. There are several forms for doing this.
... for X turns:
Takes effect starting this turn, and lasts for
the stated amount of turns.
Example: Asami stuns one enemy for 2 turns.
... for the following X
turns:
Takes effect starting the following turn, and lasts for the stated amount of turns.
Example: Yabi deals 30 piercing melee damage to one enemy and affects the target with a poison affliction, dealing 10 affliction damage each turn the following 3 turns.
... this turn:
Has effect only during this
turn.
Example: Asami increases melee and ranged damage dealt to all enemies by 15 this turn.
...
infinitely:
Takes effect starting this turn, and lasts an infinite amount of turns.
Example: Hana affects one enemy with a Ki affliction infinitely, dealing 10 affliction damage each turn.
During this time...:
All effects mentioned under the "During this time" stay in the game as long as the afore mentioned
effect is in the game.
Example: Affects Kuro with Last Sunset infinitely. During this time, melee and ranged damage dealt to Kuro is reduced by 10 and 10 affliction damage is dealt to Kuro each turn.
Durations in Skill Effects
Once an effect has entered the game, the remaining duration is noted in the effect's description.
Infinite:
This effect's duration does not end.
X turns
left:
This effects stays in the game for the stated amount of turns. It's duration will not be decreased this part of the turn.
X turns left
(-):
This effects stays in the game for the stated amount of turns. It's duration will be decreased at the end of this turn.
Ends this
turn:
This effect is removed at the end of this turn.