Forte gladii are slayer monsters, requiring 90 Slayer to be attacked and are part of the elite order of Ascension, located in the second floor of the Monastery of Ascension. Similar to their weaker counterpart (gladii), Forte gladius use a special attack in which they charge towards the player and stun them, usually at the start of the battle, and then throughout as damage is dealt to them. The movement of the charge is roughly an L-shape, like that of the Knight piece in a game of chess. This charge can be cancelled by staying close to the monster. If you are immediately next to a forte gladius, it will jump backwards from you in an attempt to do its charge attack. If you do manage to keep up with it as it moves, it will not charge.