A fully upgraded Dreadcharger at 700 HP is the toughest Shadow creature at tier 1, even without stored lifepoints, and with Swift to get into position faster it is the target of choice for Nasty Surprise at tier 1.
It can cause friendly-fire; other units should be kept out of harm's way. If there are any enemy units left to fight afterwards, other units can be summoned or rallied to the fight after the blast. Both the caster and the defender must consider the implications of buildings in the area of effect of the blast, and the consequent distribution of a portion of the damage to such buildings.
Turns an own unit into a living bomb that explodes immediately dealing 150% of its current life points as damage to hostile and friendly units within a 25m radius, up to 33% per target and 3000 in total. Knocks back small and medium units. Reusable every 5 seconds.
Soulshatter (Nasty Surprise should help create some corpses for Soulshatter; if possible, NS' target unit can rush in after the initial Soulshatter damage and before the corpse explosion effect wears off)