The Endless Rush Rune can be collected once you have collected all 100 other runes. At this point, all the runes you collect will be Endless Rush runes that will increase the Endless Rush multiplier This buffs Endless Rush while it is active.
The Endless Rush Rune allows your Crabs to progress further even while you aren't playing under the condition that:
- Your Crabs are able to defeat the boss to progress. This does not take into account boss timer extensions.
- You are not at your current tournament personal best distance(the distance shown on the leaderboard). This means unless you Ecdysis during a tournament, the Endless Rush Rune won't ever activate.
- You are not at your all time personal best distance.