Ice javelin is the Ice B move for mages. it is one of two moves in the game that has a rooting (stranded) effect on players, the other being Ice D aka Blizzard Caress. Ice javelin is the highest single damage move for ice chain mages and allows for the freezing effect. Look up stranded for more info. Ice javelin is one of the harder moves to aim and use effectively but for experienced players, it is very handy to immobilize and finish off constantly moving enemies.