A rift countdown only advances in eligible conditions. Before enough run time, with a live boss, inside an arena or while an entrance already exists, the usual “every 30 seconds” expectation does not apply.
What to do
- Check that run time is greater than 75 seconds.
- Finish any active scheduled boss.
- Check whether an entrance is already marked elsewhere.
- In co-op, verify the host is active.
- Enter consecutive eligible misses in the planner and allow for placement failure.
Numbers & conditions
Consecutive valid miss probabilities increase by 20 percentage points from 20% to 100%. Cumulative success across five valid checks is 20%, 52%, 80.8%, 96.16% and 100%, excluding failure to place the entrance.
Common mistakes
Elapsed wall-clock time is not the same as eligible checks. A boss-blocked check does not increase the miss counter.
Tools
Related pages
Game data & sources
The linked game files show where these stats, costs and rules come from. Updates to the game may change them.
Data version: 89ee17ad
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