Encore

You compel a target to instantly repeat the action of its previous turn. An unwilling target makes a Wisdom check to resist the effects of this spell.

Any dice associated with the repeated action (attack rolls, ability checks, etc.) are rolled as normal. 

The target must be physically capable of repeating its previous action for this spell to take effect. For example, an archer can not fire an arrow again if they are out of arrows and a wizard cannot cast a spell again if they are out of spell slots for that spell. However, a warrior that attacked someone with a sword can be made to slash at the same space again, even if their previous target has already moved from that position.