An Wiggle Die is a 10 sided die which, when added to a pool, is not rolled. Instead, after rolling the pool, the player sets the Wiggle Die to a specific value between 1 and 10, usually to match another value rolled. This means if you have a single Wiggle die in a pool, you will generally succeed at some level in the task (unless this roll is contested).
Wiggle Dice cost twice the cost of an Expert or Hard Die, or four times the cost of a normal die in character points to purchase. Normal humans may not have Wiggle dice in any attribute or skill. Wiggle dice may be purchased by exceptional beings or superhumans, so long as the character’s archtype allows for it.
Wiggle dice are also the last dice lost when assessing penalties on a pool.