Endgame combat challenge in a gacha game like Arknights: Endfield is pretty much expected, since the developer needs to provide an incentive for players to raise their Operators. In Endfield's case, the endgame content is called Umbral Monument. Unlike Genshin Impact's Spiral Abyss, which unlocks via exploration, Umbral Monument is locked in the beginning and only opens three weeks after the game's release. Here's a guide on the Umbral Monument start time in Arknights Endfield.
Arknights Endfield Tier List
A tier list can help players assess the characters they have and which to prioritize; here's Arknights: Endfield tier list.
Umbral Monument Start Time In Arknights Endfield
Umbral Monument in Arknights: Endfield will begin on February 12, 2026. The endgame challenge will come with the [Those Forsaken by the Land] Series, and after two weeks, on February 26, 2026, the [Inorganic Construct] Series will be available as well.
Additionally, there will be a limited-time event for Umbral Monument, called Monumental Etching. Here's the release time for the event:
- Those Forsaken by the Land: February 12, 2026, at 12:00 PM server time
- Inorganic Construct: February 26, 2026, at 12:00 PM server time
There's limited information about the differences between Umbral Monument and Monumental Etching, but it will likely be similar to Honkai: Star Rail's Conventional Memoir. So it's a permanent content that you can play at any time, but the Monumental Etching provides extra rewards if you manage to complete all the tasks within the designated time frame. In this case, the first two Monumental Etching will run until the end of version 1.0, which would be somewhere around March 9 to March 12, 2026.
Umbral Monument rewards items such as T-Creds, Mark of Perseverance, Advanced Cognitive Carrier, Arms INSP Set, and Protohedron. Meanwhile, the Monumental Etching additionally grants Oroberyl rewards. So, you must complete the challenge within the event's time frame if you wish to collect more pulls for the Endfield banners.
Umbral Monument In Arknights Endfield
Umbral Monument is a high-difficulty combat mode, and it comes in two modes, Normal and Agony modes. You must complete the normal challenge before unlocking the Agony version.
You can bring tactical items in the Normal mode, so you can heal with items such as Buck Capsule [A]. However, you can't do so in Agony mode, so you need to learn how to dodge or raise your characters to ensure they can survive the combat.
Additionally, bringing sustain characters such as Ardelia, Ember, and Gilberta in Endfield, will also help keep the team alive.