Tomb stalker

They always lose one less wound than usual from combat resolution. 
5+ Armour Save

Place a coin on the table anywhere after deployment for each unit buried in the sands. 

Roll a dice from turn two only to see if they emerge. 

Turn 2=4+
Turn 3=3+
Turn 4=2+
Turn 5=Automatically Emerge

Roll a scatter and artillery dice and move the marker. If it's under a unit, they count as charging. They can move normally, including charge. 

If a misfire is rolled, consult this table. 

1-2 Magic Dissipated: Do not emerge. Enemy gets victory points
3-4 Too Deep: Do not emerge. No victory points
5-6 Misaligned: Emerge, but opponent can place place the marker anywhere on the battlefield and cannot move the turn it emerges