"Tertius" redirects here. For the keystone, see Ascension Keystone Tertius.
For the pet version, see Legio Tertiolus.
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Legio Tertius is one 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.


100% drops

Item Quantity Rarity GE price
Ascension shard.pngAscension shard16–26Always4,096–6,656


No charmGold charm.pngGreen charm.pngCrimson charm.pngBlue charm.png
Represents a 90% confidence range based on a sample of 1,058 kills.
6 charms are dropped at a time.
Add data to the log (requires JavaScript).

Main drop

Item Quantity Rarity GE price
Coins 10000.pngCoins37,000–40,000Common37,000–40,000
Coins 10000.pngCoins57,000–60,000Uncommon57,000–60,000
Grimy snapdragon.pngGrimy snapdragon10Common17,890
Grimy avantoe.pngGrimy avantoe10Common10,430
Grimy dwarf weed.pngGrimy dwarf weed5Common42,380
Grimy lantadyme.pngGrimy lantadyme5Common37,755
Grimy torstol.pngGrimy torstol5Uncommon26,945
Dwarf weed seed 5.pngDwarf weed seed2Common1,644
Lantadyme seed 5.pngLantadyme seed2Common1,452
Torstol seed 5.pngTorstol seed1Uncommon540
Rune platebody.pngRune platebody(noted)Uncommon74,960
Dragon longsword.pngDragon longsword1Uncommon56,212
Off-hand dragon longsword.pngOff-hand dragon longsword1Uncommon55,396
Sirenic scale.pngSirenic scale1Uncommon[1]698,722
Rune bar.pngRune bar4Uncommon11,940
Magic shieldbow (u).pngMagic shieldbow (u)45–55Common18,315–22,385
Dragon arrowheads 5.pngDragon arrowheads30–60Common8,310–16,620
Rune arrowheads 5.pngRune arrowheads80–120Common10,560–15,840
Onyx bolt tips 5.pngOnyx bolt tips1–11Uncommon7,107–78,177
Crystal triskelion fragment 1.pngCrystal triskelion fragment 1[2]1Very rareNot sold
Crystal triskelion fragment 2.pngCrystal triskelion fragment 2[2]1Very rareNot sold
Crystal triskelion fragment 3.pngCrystal triskelion fragment 3[2]1Very rareNot sold

Tertiary drops

Item Quantity Rarity GE price
Ascension Keystone Primus.pngAscension Keystone Primus1Rare (1/384)[3]633,433
Ascension Keystone Secundus.pngAscension Keystone Secundus1Rare (1/384)[3]403,433
Ascension Keystone Tertius.pngAscension Keystone Tertius1Rare (1/384)[3]283,299
Ascension Keystone Quartus.pngAscension Keystone Quartus1Rare (1/384)[3]266,819
Ascension Keystone Quintus.pngAscension Keystone Quintus1Rare (1/384)[3]283,222
Ascension Keystone Sextus.pngAscension Keystone Sextus1Rare (1/384)[3]279,941
Ascension grips.pngAscension grips1Very rare (1/2,056)[3][4]5,259,669
Ascension signet III.pngAscension signet III1Rare (1/50)[3]Not sold
Corrupted Ascension signet III.pngCorrupted Ascension signet III1Very rare[5]Not sold
Starved ancient effigy.pngStarved ancient effigy1Very rareNot sold
Order journal page.pngOrder journal page1UncommonNot sold
  1. ^ Previously confirmed to be 1/8 by Mod Lee, later updated.[1].
  2. ^ a b c Triskelion fragments are dropped in order.
  3. ^ a b c d e f g h Mod Timbo. "Revealing Drop Rates." 13 October 2017. Developers' Blogs.
  4. ^ Only while on a Slayer assignment.
  5. ^ Has a base drop rate of 1/1,000, with a threshold of 1,200.

Universal drops

Universal drops are dropped by nearly every monster outside of Daemonheim.
These drops are dropped alongside main drops.
Item Quantity Rarity GE price
Key token.pngKey token1RareNot sold
Mimic kill token.pngMimic kill token1Very rare5,575


  • I Got This (RuneScore.png 40) - Defeat each of the six Legiones consecutively without leaving the Ascension dungeon.
  • Stand Your Ground (RuneScore.png 50) - Defeat each of the six Legiones without moving.
  • We Are Legion (RuneScore.png 0) - Obtained a collection of unique drops from Legiones.


  • 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.
Community content is available under CC-BY-SA unless otherwise noted.
... more about "Legio Tertius"
June 4, 2013 +
Ascension shard (16, 26, Always) +, Coins (37,000, 40,000, Common) +, Coins (57,000, 60,000, Uncommon) +, Grimy snapdragon (10, 10, Common) +, Grimy avantoe (10, 10, Common) +, Grimy dwarf weed (5, 5, Common) +, Grimy lantadyme (5, 5, Common) +, Grimy torstol (5, 5, Uncommon) +, Dwarf weed seed (2, 2, Common) +, Lantadyme seed (2, 2, Common) +, Torstol seed (1, 1, Uncommon) +, Rune platebody (2, 2, Uncommon) +, Dragon longsword (1, 1, Uncommon) +, Off-hand dragon longsword (1, 1, Uncommon) +, Sirenic scale (1, 1, Uncommon) +, Rune bar (4, 4, Uncommon) +, Magic shieldbow (u) (45, 55, Common) +, Dragon arrowheads (30, 60, Common) +, Rune arrowheads (80, 120, Common) +, Onyx bolt tips (1, 11, Uncommon) +, Crystal triskelion fragment 1 (1, 1, Very rare) +, Crystal triskelion fragment 2 (1, 1, Very rare) +, Crystal triskelion fragment 3 (1, 1, Very rare) +, Ascension Keystone Primus (1, 1, Rare) +, Ascension Keystone Secundus (1, 1, Rare) +, Ascension Keystone Tertius (1, 1, Rare) +, Ascension Keystone Quartus (1, 1, Rare) +, Ascension Keystone Quintus (1, 1, Rare) +, Ascension Keystone Sextus (1, 1, Rare) +, Ascension grips (1, 1, Very rare) +, Ascension signet III (1, 1, Rare) +, Corrupted Ascension signet III (1, 1, Very rare) +, Starved ancient effigy (1, 1, Very rare) +, Order journal page (1, 1, Uncommon) +, Key token (1, 1, Rare) +  and Mimic kill token (1, 1, Very rare) +
17,151 +
June 4, 2013 +