Slann Mage Priest

For all Leadership tests, Lizardmen units roll 3 dice and choose the lowest 2 scores

Treat the Slann as a single model with a sinlge profile, rather like a chariot. If the Slann has joined a unit of troops, the unit counts rank bonuses as if the space taken by the palanquin was taken by normal troops.
The palanquin may be placed in the centre of the second rank of troops, rather than in the front rank. It is only ever forced to move into the front rank if the front rank is reduced to less than three models. If the palanquin is forced to move to the front rank, it is placed in the centre of the remaining two troops - slide them aside so that the Slann may fit between them. If there is just one model left in the front rank, simply place the Slann next to it. While the Slann has no enemy models in base to base contact, it does not count as being in combat for purposes of its own spell casting and use of magic items, even if the unit around it is. This means that it may still cast spells as if it were unengaged, as it sometimes rises on its palanquin above the fighting to cast its powerful magic before dropping back within the protection of its unit. 
However, the Slann still counts as being in combat in regards to enemies wishing to target the Slann.

Slann will never fight. If engaged in combat, its single attack is made by its Skink attendant darting forward to strike before retreating once again behind the throne. 
Slann may never take magic weapons or magic armour when choosing magic items.

For spell casting, the Slann is considered to be able to draw a line of sight to everything that any Skink Priests or other Slann on the table can see. Note that it is still the Slann that casts the spell, and the range is measured from the Slann itself, ignoring any intervening terrain. Eg a Slann in the second rank of a unit of Saurus Warriors that are engaged in combat may cast magic missiles at a foe (even though the Slann itself cannot see them) that a friendly Skink Priest can see, so long as the target is within range of the Slann.

Slann are protected by potent magical defences that give them a 4+ ward save

When a Slann Mage-Priest selects his spells before a battle he is allowed more freedom than normal. He may use any Lore from the Warhammer rulebook. What's more, a single Slann can choose from more than one Lore instead of being limited to just one.
Pick a list, roll a dice to see what you get, choose the default spell instead if you like and then choose another list or the same again.
You cannot have the same spell from the same list more than once per Wizard as normal. However, you could have the same effect from two different spells.

The model has a unit strength of 5