Dark Riders

Unit always strikes first
If the unit's Initiative is equal to or higher than the enemy's, he can re-roll failed misses when striking in close combat.

Re-roll Missed attacks during the first round of close combat against High Elves

Models with this special rule (but not their mounts) re-roll all To Wound rolls of a 1 when making close combat attacks.

Vanguard deployment rule
Free Reform
Characters without Fast Cavalry remove this effect from the unit
Feigned Flight
Fire on the March