Cyclossus

The Cyclossus is a monster found inside the Warriors' Guild. It is much taller than regular Cyclops and drops the Dragon defender and the Cyclopean helmet. There is a chance a cyclossus will be summoned when a player kills a regular cyclops, providing the player had shown a Rune defender or dragon defender to Kamfreena before entering the room. To fight a cyclossus, the player must wield a rune or dragon defender.

When a cyclossus first appears, it can only be attacked by the player it is after, and nobody else. (On the first day there was a bug where if many players tried to attack it, one would succeed if the original player stopped attacking long enough.) If the original player breaks off combat with the cyclossus (by not attacking it or being attacked by it for 10 seconds), the cyclossus will walk around the room taunting other players by name. During this time, any player not in combat can attack the cyclossus, not just the original player.

The cyclossus possesses a special move which shoves the player back several square and knocks the player down. The cyclossus then follows this move up with a magic attack that looks like a tiny lightning bolt. This always hits, damaging and stunning the player. The player cannot move while stunned but can do things, like eating or taking a potion, that do not require movement.

The melee attacks of a cyclossus are much more accurate than those of a regular cyclops. Not even a high defence level and high-stat gear is enough to avoid taking damage, so food is recommended. The Protect from Melee prayer blocks the melee damage and is recommended for player who have that prayer. This prayer, however, does not block the special move or magic attack of the cyclossus. Kamfreena does not allow Ancient Curses to be used in the cyclopes room, so Deflect Melee cannot be used. Ancient-curse users should switch to the regular prayers if they wish to use prayer in the room.

Some drops will be noted and in a higher quantity if "Using multiple token types" is selected when entering the room. For example, the player will always receive 2 noted Big bones when killing a cyclossus.

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Trivia

 * On the day of release many players complained about the Cyclossus being easily stolen by other players due to its special attack which stuns the player for a short period of time, roughly the same as being stunned from a failed pick pocketing attempt. This would leave the player's Cyclossus vulnerable to other players attacks and could potentially lead to the Cyclossus being stolen. This was actually a glitch and was fixed the following day. Now, attempting to attack another player's Cyclossus will yield the message "The Cyclossus isn't after you at the moment," even if the player it is after isn't attacking it. The Cyclossus can still be stolen from a player if the player hasn't damaged it and fails to attack after a stun, or if the player unequips the defender, or if they leave the room, even if damage was dealt initially.
 * The Cyclossus has a very low maximum hit in comparison to other monsters of the same level however its low hits are made up by the fact that it almost always hits and can hit multiple times if it uses its special attack then melees the player.
 * Cyclossus is a portmanteau of the terms "cyclops" and "colossus", meaning it is a big cyclops.
 * It seems to follow the same movements as a Brute.
 * The dragon defender and the Cyclopean helmet are considered extra drops. It is possible to get both the Dragon defender and the Cyclopean helmet at the same kill as well as the normal drop.
 * The Cyclossus has the highest combat level of all giants with a combat level of 156, Glod being second with a combat of 138 however despite having the highest combat level they do not have the highest maximum hit.
 * Cyclossus is one of the few monster in RuneScape that has an extended life bar.
 * Cyclossus special attack can be negated by standing against a wall. this will still stun you but you will stay within melee reach to carry on fighting,