Notes

Be careful in the lair, as the other two kings can hurt you if you are not using their specific protection prayer.

Tactics

Dagannoth Rex cannot be hit by melee or range, so mage him from the edge of the moat. Rex likes to move around a lot, and his huge tail will swipe out at you and deal up to 260 damage if you get too close. Also, when he swipes, damage will be dealt to multiple players if you're standing together, so spread out if you're there with a team. If you see Rex coming for you, break off the attack, get back and wait for him to attack someone else, and then recommence attacking.

You can solo kill or dual kill the Rex by bringing a high level spell such as Fire wave, Magic dart, or an ice spell and maging Rex from the south-east corner of the island next to the seaweed. Be sure to bring plenty of prayer potions, food, and a teleport out. Bring Guthan armour if you can afford it for its healing properties.

Examine

Firstborn of the legendary dagannoth kings.

Top Drops

Clue scroll (level-3), Clue scroll (level-4), Dragon med helm, Dragon hatchet, Berserker ring, Warrior ring

Drops

Dagannoth bones (100%), Dagannoth hide (100%), Rune hatchet, Rune sq shield, Rune 2h sword, Rune arrow (42), Adamant hatchet, noted Silver ores (100), Steel bar (12-29), Rock-shell platebody, Rock-shell platelegs, Adamant bar, Half of a key, Mithril warhammer, Mithril 2h sword, Mithril pickaxe, Coins (211-3000), Ring of life, Grimy ranarr, Earth talisman, Mind talisman, Nature talisman, Zamorak brew (2), Saradomin brew (2), Super strength potion (2), Super attack potion (2), Super defence potion (2), Prayer potion (2), Restore potion (2), Swordfish (5), Bass (5), Shark (5), Steel kiteshield, Steel platebody, Nature rune (67), Law rune (45), Death rune (45), noted Mithril ore (25), noted Coal (100), noted Iron ore (150), Body talisman, Water talisman, Fremennik blade, Fremennik shield, Fremennik helm, Rune javelin (5), Rune Kiteshield, Steel arrow (150)