Legio Tertius

"Tertius" redirects here. For the keystone, see Ascension Keystone Tertius.

For the pet version, see Legio Tertiolus.

This article has a strategy guide. All information on mechanics, setups, and tactics is on the subpage.

[view] • [talk]

Legio Tertius
Release																				4 June 2013 (Update)
Members																				Yes
Options																				Attack, Examine
Race																				Ascension members
Examine																				A powerful Order of Ascension unit.
Combat info
Combat level																				304
Life points																				30,000
Aggressive
Poisonous
Combat experience
XP																				1,500
XP																				1,829.2
XP																				495
XP																				135 (two-handed) 67 (one-handed and armour)
Slayer info
Level																				95
Assignment																				Ascension members
Master																				Duradel: 100–125 Kuradal: 100–125 Morvran: 120–150 Laniakea: 120–150
Offensive
Max hit
0												0												1,102												0												? (edit)
Style																														Rate
																														10 ticks (6.0s)
Combat levels
1															1															90															1
Accuracy
0															0															2,458															0
Defensive
Armour																				Weakness															Susceptible
2,178										85
Base hit chance
70															7															70															15
Immunities
Immune															Immune															Immune															Not immune
Advanced data
NPC ID															17151
Links															bestiary • MRND

Legio Tertius is the third of the bosses in the Monastery of Ascension. Accessing him requires an Ascension Keystone Tertius.

As with all the bosses in the Monastery of Ascension, Legio Tertius attacks primarily with a combination of a basic magic attack and a lightning attack - the latter of which is focused in a 2x2 square (expanding to a 3x3 square and then to a 4x4 square over two game ticks) which deals high, magic-style damage to the player if they stand where the lightning falls. (The lightning attack is always affixed to the player's location, and thus continuously moving throughout the fight is imperative.)

Like all of the Legiones within the Monastery of Ascension, Legio Tertius has a special ability which activates as his life points are gradually depleted in 25% intervals (every 7,500 life points drained) until death - occurring a total of three times throughout the fight. His special ability, however, is that he summons other ascended to aid him throughout the fight. As with all other Legiones, his special ability's activation is signaled by an overhead chat message. In total, he summons three Rorarii at 75% life points, one Gladius at 50% life points, and finally a Capsarius at 25% life points remaining. Once the capsarius uses it healing buff on Tertius, it will need to be killed - though it is possible to kill Tertius before the capsarius focuses on him, using a combination of high-level weapons and powerful, well-timed abilities. The ascended he summons do not drop anything. When Tertius dies, all his summoned ascended also die.

Location

Location	Levels	Members	Requirements	Spawns	Map
Monastery of Ascension	304		Ascension Keystone Tertius	? edit	? edit

Drops

Drop rates estimated based on 22,871 samples from the Drop Log Project, unless otherwise cited.

The average Legio Tertius kill is worth 95,452 coins.

100%

	Item	Quantity	Rarity	GE price	High Alch
	Ascension shard	16–26	Always	56,752–92,222	N/A

Charms

Nothing	6	6	6	6
41–46%	13–16%	9–12%	16–20%	12–16%
Represents a 90% confidence range based on a sample of 1,058 kills. 6 items are dropped at a time. Add data to the log (requires JavaScript).

Weapons

	Item	Quantity	Rarity	GE price	High Alch
	Dragon longsword	1	9/256	57,138	60,000
	Off-hand dragon longsword	1	9/256	56,868	60,000

Seeds

	Item	Quantity	Rarity	GE price	High Alch
	Avantoe seed	2	10/128	2,740	76
	Snapdragon seed	2	10/128	3,414	76
	Lantadyme seed	2	9/128	1,072	76
	Dwarf weed seed	1	5/128	1,528	38
	Dwarf weed seed	2	4/128	3,056	76
	Torstol seed	1	4/128	525	38

Materials

	Item	Quantity	Rarity	GE price	High Alch
	Magic shieldbow (unstrung)	45–55 (noted)	9/128	17,325–21,175	34,560–42,240
	Rune arrowheads	80–120	9/128	16,000–24,000	480–720
	Dragon arrowheads	30–60	5/128	18,780–37,560	9,000–18,000
	Onyx bolt tips	1–11	8/128	6,442–70,862	5,400–59,400

Other

	Item	Quantity	Rarity	GE price	High Alch
	Coins	37,000–40,000	Common	37,000–40,000	37,000–40,000
	Coins	57,000–60,000	Uncommon	57,000–60,000	57,000–60,000
	Huge plated rune salvage	2 (noted)	9/128	75,138	80,000
	Sirenic scale	1	5/128	11,581	6,000
	Banite stone spirit	5	9/128	1,630	N/A
	Inert adrenaline crystal	1 (noted)	Unknown	1,173	2,400
	Crystal triskelion fragment 1 (m)	1	1/2,500	Not sold	N/A
	Crystal triskelion fragment 2 (m)	1	1/2,500	Not sold	N/A
	Crystal triskelion fragment 3 (m)	1	1/2,500	Not sold	N/A

Tertiary

	Item	Quantity	Rarity	GE price	High Alch
	Order journal page	1	Uncommon	Not sold	N/A
	Ascension signet III	1	1/50	Not sold	N/A
	Ascension Keystone Primus	1	1/384	324,126	N/A
	Ascension Keystone Secundus	1	1/384	149,913	N/A
	Ascension Keystone Tertius	1	1/384	105,365	N/A
	Ascension Keystone Quartus	1	1/384	105,016	N/A
	Ascension Keystone Quintus	1	1/384	92,804	N/A
	Ascension Keystone Sextus	1	1/384	94,715	N/A
	Ascension grips	1	1/2,056	3,752,507	30,000
	Corrupted Ascension signet III	1	1/1,000–10/1,000	Not sold	N/A
	Starved ancient effigy	1	~1/2,500	Not sold	N/A

Universal drops

Universal drops are dropped by nearly every monster and skilling action outside of Daemonheim.

These items are dropped alongside main drops.

	Item	Quantity	Rarity	GE price	High Alch
	Key token	1	Rare	Not sold	N/A
	Mimic kill token (m)	1	1/10,000	71,081	N/A

Achievements

Main article: Legiones achievements

• I Got This ( 40) – Defeat each of the six Legiones consecutively without leaving the Ascension dungeon.
• Stand Your Ground ( 50) – Defeat each of the six Legiones without moving.
• We Are Legion ( 0) – Obtained a collection of unique drops from Legiones.
• Descension I ( 5) – Defeat any of the Ascension Legiones. (X/5)
• Descension II ( 5) – Defeat any of the Ascension Legiones. (X/10)
• Descension III ( 5) – Defeat any of the Ascension Legiones. (X/25)
• Descension IV ( 5) – Defeat any of the Ascension Legiones. (X/50)
• Descension V ( 5) – Defeat any of the Ascension Legiones. (X/75)
• Descension VI ( 5) – Defeat any of the Ascension Legiones. (X/100)
• Let It Go, Legio ( 0) – Obtained a collection of unique drops from Slayer monsters located within Feldip Hills.

Gallery

• 

  Legio Tertius wearing a Santa hat during Christmas.

Update history

This information has been compiled as part of the update history project. Some updates may not be included – see here for how to help out!

• hidden 11 September 2023 (Update):
  • The 50% combat experience reduction on bosses has been removed. Bosses now give 50 combat experience per 1,000 life points, like most other monsters in the game.

• update 7 November 2022 (Update):
  • Herb drops replaced with their seeds instead.

• patch 11 January 2021 (Update):
  • Various bosses around RuneScape have taken their Santa Hats off for another year.

• patch 4 May 2020 (Update):
  • Runite stone spirits have been replaced by banite stone spirits.

• patch 7 October 2019 (Update):
  • Legio Tertius' boss defence buff will no longer persist after Capsarius has been killed.

• patch 3 August 2015 (Update):
  • Familiars now deal less damage to Legio Tertius while he is being healed by a Capsarius.

• ninja 29 June 2015 (Update):
  • Legio Tertius's rorarius, gladius and capsarius guards are now killed automatically when their master falls in battle.

• update 4 June 2013 (Update):
  • Added to game.

Dialogue

This article on an NPC has an associated dialogue page. Click here for a transcript of possible conversations and other messaging related to this NPC.

Trivia

• Legio Tertius is roughly Latin for "Third Legion". However Legio is a feminine noun, while Tertius is a masculine adjective; the correct form would be Legio Tertia. Legions were the largest units of the Roman army and there were 6 in a whole army, hence there are six legiones in the Monastery.
• Legio Tertius' summoned ascended did not die with him prior to an update on 29 June 2015 - players had to kill them after he died, or leave the room and create a new instance.
• Some time after the release the drop rate of the signet was increased from 1/64 to 1/50.