Encounter IDs

The official EVTC documentation (https://www.deltaconnected.com/arcdps/evtc/README.txt, fetched 2026-08-08) ends with three reference lists that parsers and log tooling need: the species ids that trigger boss logs, the secondary target ids, and the buff skill ids whose CBTS_BUFFINFO/CBTS_BUFFFORMULA metadata is always written to logs. They are reproduced here.

Two special values appear in the EVTC header instead of a species id: 1 marks a WvW log and 2 marks a map log.

Log-starting bosses (`characters[]`)

“npcs that get used for starting logs” — when the first damage event hits one of these species ids, it becomes the log’s boss.

Raids

Species id	Encounter
15438	Vale Guardian
15429	Gorseval
15375	Sabetha
16123	Slothasor
16088	Berg (Bandit Trio)
16115	Matthias
16253	McLeod (Escort)
16235	Keep Construct
16247	Twisted Castle
16246	Xera (100–50%)
17194	Cairn
17172	Mursaat Overseer
17188	Samarog
17154	Deimos
19767	Soulless Horror
19828	River of Souls (“rainbow road”)
19691 / 19536 / 19844	Statues of Grenth
19450	Dhuum
21105	Nikare (Twin Largos)
20934	Qadim
21964	Sabir
22006	Adina
22000	Qadim the Peerless
26725	Greer
26774	Decima
26867	Decima CM
26712	Ura

Fractals

Species id	Encounter
17021	MAMA
17028	Siax
16948	Ensolyss
17632	Skorvald
17949	Artsariiv
17759	Arkk
23254	Sorrowful Spellcaster (Ai)
25577	Kanaxai
26231	Eparch
27010	Whispering Shadow

Strikes

Species id	Encounter
22154	Icebrood Construct
22343	Voice of the Fallen (Kodan)
22492	Fraenir of Jormag
22521	Boneskinner
22711	Whisper of Jormag
24033	Mai Trin
23957	Ankka
24485	Minister Li
24266	Minister Li CM
25413 / 25414	Old Lion’s Court (NM / CM)
25705	Dagda
25989	Cerus

Golems and special

Species id	Encounter
16199	Standard Kitty Golem
16177, 16198, 16178, 16202, 16169, 16176, 16174, 19645, 19676	other training-area golems
21333	Freezie (Wintersday)

Secondary targets (`characters_secondary[]`)

“npcs that get used for vs target dps” — additional agents counted for target-DPS stats, e.g. 15434 (Gorseval’s charged soul), Sabetha’s adds (15372, 15404, 15430), 16286 (Xera 50–0%), Kenut 21089 (Twin Largos), Mai Trin / Minister Li phantoms and lieutenants, observatory flux anomalies, and Lonely Tower fractal adds (Cruelty 26270, Judgement 26260). The source list also contains commented-out entries marking targets deliberately not counted — consult the README directly when you need the exact current set.

Always-included buff-formula skills

CBTS_BUFFINFO / CBTS_BUFFFORMULA events are always written for this skill-id mask, so logs can reconstruct common buff behavior without the buff needing to appear organically:

Skill id	Buff
717	Protection
718	Regeneration
719	Swiftness
723	Poison
725	Fury
726	Vigor
736	Bleeding
738	Vulnerability
740	Might
742	Weakness
861	Confusion
873	Resolution
1187	Quickness
19426	Torment
30328	Alacrity
42883	Kalla’s Fervor

The mask also includes these ids, listed without names in the source: 9162, 9759, 9774, 9776, 9779, 9784, 9788, 9792, 10004, 10231, 10233, 12518, 13061, 14444, 14458, 14459, 15788, 15790, 17825, 25879, 29025, 29466, 36406, 43499, 44871, 46273, 51683, 53222, 62733.

Finding ids in-game

From the official site: the NPC id for a PvE log “can be found via detail window and noting species in window title, or tooltip in target list after attacking.” Additional boss ids and map ids can be added in the arcdps logging options (binary evidence, build 1.2026.718.905: “Additional boss IDs”, “Map ID can be found in the metrics window tooltip”, and a blacklist mode — “Log all instance maps except those on the map ID list”).

Detecting the encounter in your parser

In practice you rarely need to match these ids at all: the boss species id is written directly into the EVTC header at byte 13 (a uint16_t). Read it first. The two special values above short-circuit the rest — 1 means a WvW log and 2 means a map log; any other value is the boss species id, which you can look up in the log-starting bosses table.

import struct

boss_id, = struct.unpack_from("<H", header, 13)  # bytes 13-14 of the 16-byte header
if boss_id == 1:
    kind = "wvw"
elif boss_id == 2:
    kind = "map"
else:
    kind = BOSSES.get(boss_id, "unknown")  # BOSSES keyed by species id

Fall back to the event stream only if the header id is missing or you want to confirm it: the log’s boss is “the first damage event on boss”, so scan CBTS_COMBAT events in order and match the first target species id against the log-starting bosses list above. See parsing EVTC logs for reading the header and walking the event stream.