Valois used the Hasta Fatum to conjure up watery hands to attack the Wyvern gargoyles, when they came to Kenneth II's aid in the battle with Culen. The Archmage counter-attacked with a spell, severing the spearhead from the shaft.
Real World Background
"Hasta Fatum" is Latin for "Spear of Fate". ("Hasta" is a technical term for a kind of thrusting spear used in ancient Rome.)