When drawing attack modifier cards:

The rolling modifier indicates that an additional modifier card should be drawn.

Modifier cards are then drawn until a rolling modifier is not revealed.

All the drawn modifiers are added together.

Example: This would minus one from base attack but add an immobilize and pull effect.

If a rolling modifier card was drawn during an attack with Advantage, its effect is added to the other card played.

If two rolling modifiers were drawn, keep drawing until a rolling modifier is not revealed and add all those effects together.

Example: This would combine to equal -1.

Rolling modifiers are disregarded in the case of Disadvantage .

If two rolling modifier cards were drawn, continue to draw cards until a rolling modifier is not played and then only apply the effect of the last card drawn.

Example: The two +1 are ignored, so the total is +2.