The Spirit of Kurnous

During a turn in which it made a charge move of 3" or more, a model with this special rule gains a +1 modifier to its Attacks characteristic.

If during the Declare Charges & Charge Reactions sub-phase of its turn, a unit that includes one or more Impetuous models is able to declare a charge, it must make a Leadership test. If this test is failed, the unit must declare a charge. If this test is passed, the unit may act as normal.