Banshee

Ethereal beings are insubstantial creatures which can move through solid objects. They therefore suffer no movement penalties for moving over difficult terrain or obstacles, or from other reductions to movement (such as the Anvil of Doom Rune of Water or the Pit of Shades spell).
They can move through building: just as easily,
but not through other units. They cannot, however, end their movement inside impassable terrain nor see through anything that would block the line of sight of normal units. Ethereal creatures block line of sight normally (the enemy cannot see through them).
Because they are insubstantial, they can't he harmed in combat except by attacks from magical weapons. Daemons or other Ethereal creatures, though they can be affected by spells as normal. Ethereal creatures can still he beaten in close combat and suffer extra wounds as a consequence because combat results are not wholly dependent upon casualties.

A Banshee is capable of emitting an eerie howl that brings death to mortals. Even the distant shriek of a Banshee is enough to strike horror into the hearts of the bravest men, and anyone hearing the constant wail of a Banshee will die of sheer fright. The Ghostly Howl of a Banshee is used in the Shooting phase. A Banshee may use it even in the Rim she has declared a charge or marched and even when engaged in close combat, but in this case she can Howl only against one of the units she is fighting (the Howl will affect only the target unit, even in a multiple fight). The attack has a range of 8". The Banshee can target any one unit within this range (even characters on their own that could not normally be targeted by shooting, but not characters inside units) and does not need a line of sight to the target Roll 206+2 and deduct the Leadership value of the unit from the wore. For each point by which the roll heats the target's Leadership, the target suffers 1 wound, distributed exactly like missile fire amongst the unit. So if you roll a 9, thereby obtaining a total of 11, and the target unit's Leadership is 8. the unit suffers 3 wounds. No armour saving throw is allowed against wounds caused by a Banshee's Howl, but units can use the superior Leadership of the character who is leading them or even the General's, if he is within 12". Units which are Immune to Psychology are not affected by the Howl. In the case of ridden chariots/monsters. war machines and similar units, use the highest Leadership value of the models involved to determine the number of wounds caused and then randomise each wound as for shooting hits (discard wounds hitting war machines).

A Banshee is treated as a character on foot tot movement and when targeted by missiles. A Banshee has a Unit Strength of 1 and cannot join other units or characters.