The Wardancer special Shadow Dances of Loec rules, very summarised and "in a nutshell"...
there are 4 dances, you cannot perform the same one on consecutive turns, they are:-
Whirling Death
- bestows killing blow special rule (roll of 6 to wound = D E A T H)
Storm of Blades
- +1 attack
The Shadows Coil
- 4+ ward save
Woven Mist
- -1 attack but always strikes first *
notes : * with an initiative of 6 you can use this Woven Mist attack against High Elf Swordmasters and White Lions of Chrace to negate their Always Strike First special army rule. Against the Phoenix Gaurd, who also have an initiative of 6, you will need to beat them on a D6 roll to see who strikes first.