Catablepon

Catablepon are monsters that look like green bulls with reptilian tails and are found on the third level of the Stronghold of Security. They are aggressive to all players, regardless of combat level. They use the magic spell, Weaken (which looks like a spraying white sparkle), to drain strength by up to 15% of their opponent's maximum level, so it would be advisable to bring a Dragon battleaxe to boost up your strength and help counter-act this spell. Training on these is not advised to players with low strength, as Weaken can be quite significant, unless you have a strength potion, a Restore potion, or a Dragon battleaxe. It should be noted that they can melee-attack and cast Weaken at the same time and that they can't cast Weaken from a distance. It is also possible that they can damage and miss with Weaken, or miss while the spell works.

In the north-western most room of the third level of the Stronghold of Security, there is a safe spot for using Magic, Ranged, or using a halberd on level 68 catablepon. This spot is to the immediate west of the square patch of tendrils by the skeletons on the western side of the room.

100% drop

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Runes

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Trivia

 * Players who tried to say "catablepon" in-game once found that the last three letters were blocked by the chat filter; this was later fixed.
 * This monster was one of several to be created in-game after having been suggested by a player in the Suggest-A-Monster sticky in the Suggestions section of the RuneScape Forums.
 * Catablepon are based on a mythical Ethiopian creature called a Catoblepas.
 * At one point, the weaken spell that they cast seemed to only reduce a maximum of 9 in the strength stat. Tests have shown that it does in fact decrease the stat by 10.
 * If you get Catablepon as your slayer task from Mazchna the slayer master in Canifis and you ask for a tip you will be told that "Catablepon are cow-like, magical creatures that mainly live in the Stronghold of Security. Beware their weakening glare; cutting off their head should help". This is referencing Ethiopian mythology. In Ethiopian myththology, the monster Catoblepas was slain and its head chopped off as a trophy - there is no way to do this in-game.
 * After a Catablepon takes a hit, it will shake its head like it actually felt pain.
 * The level 68 catablepon seem to run away if their health is low and you eat food, but this is rare.
 * The level 64 catablepon has the most life points out of all the catablepons, while the level 68 catablepon has the same amount of life points as the level 49 catablepon.
 * Catablepons attack with magic and a bit of melee occasionally, something not many other free-to-play non-humanoid monsters do.