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The Warden Portal

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Dormant Awakened
The Warden Portal frame in an ancient city, dormant The same frame after using the Echo Tuner

Close-up of the awakened portal

In vanilla Minecraft the ancient city has a huge, empty reinforced deepslate frame in its centre. Mojang confirmed in 2026 that it is a portal to the Sift. In Minecraft Dungeons II it is woken by a note block machine. In this mod you wake it with an Echo Tuner.

Awakening it

  • Hold an Echo Tuner and use it on the frame (any frame block) or on a block inside the opening.
  • The mod looks for a complete rectangle of reinforced deepslate in either direction around that spot. The opening can be from 2×3 up to 23×23. The ancient city frame has a 20×6 opening (22×8 outside).
  • Anything left inside the opening (sculk, deepslate rubble, plants) is cleared, as long as it is breakable and not a block entity.
  • The opening fills with Sift Portal blocks, you hear a chime arpeggio, and the tuner loses 1 durability.
  • If there's no complete frame, the tuner plays a low note and tells you so.
  • Reinforced deepslate can't be obtained in survival, so in practice only ancient-city frames can be awakened. In creative you can build your own frames.

Travelling

Overworld → Sift Sift → Overworld
Delay Same as nether portals (4 s survival, instant creative; uses the players_nether_portal_*_delay game rules) same
Coordinates 1 : 1 (no scaling) 1 : 1
Destination Nearest Sift portal within 64 blocks, otherwise a new 2×3 return portal is built on the surface Nearest Sift portal within 64 blocks (usually the ancient city frame you came through), otherwise a new portal on the surface
Effect Nausea-style warp, travel sound same
  • Return portals are framed with reinforced deepslate and stand on a Polished Soulshale platform (in the Overworld, polished deepslate).
  • Breaking a frame block makes the whole membrane collapse.
  • Mobs and items can use the portal too (not the Sift's own creatures if they don't wander in).

Technical

Block ID Light Notes
Sift Portal sift_unbound:sift_portal 12 axis = x / z, unbreakable, point of interest sift_unbound:sift_portal (used to link portals)
Frame tag #sift_unbound:warden_portal_frame – contains minecraft:reinforced_deepslate; datapacks can add more frame blocks

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