Quicken

Quicken
Level8th Level Casting Time1 action Range20m
AoESingle DurationConcentration, up to 1 round
SchoolTime ComponentsV, S, M (Star sapphire worth 1,000 gp, which the spell consumes)
ClassesTime Mage

You alter time around a willing creature of your choice within range.

The willing creature rolls for Initiative 1 + 1d4 times. For 1 round, the affected creature takes a turn on each of those Initiative rolls.

Until the end of this spell, its speed is doubled, its AC increases by 2, it gains Advantage on its attack rolls, STR/DEX ability checks and DEX saving throws; and creatures have Disadvantage when making STR and DEX saving throws imposed by them. However, it cannot cast spells during this time.

When this spell ends, the target gets fatigued, and receives 1 level of

Exhaustion
. Furthermore, its speed is reduced by 4m and it becomes
Incapacitated
until the end of its next turn.