May be activated when bearer or unit they are with is charged by a flying creature, and affects all flying creatures in base contact. Flying creatures must roll a 6 to hit. Riders may not attack at all.
Source: Warhammer Fantasy: 4th Edition
May be activated when bearer or unit they are with is charged by a flying creature, and affects all flying creatures in base contact. Flying creatures must roll a 6 to hit. Riders may not attack at all.