Question about Thread Necromancy

[Faceless Mist-Wraith he/him]

I looked in the rules, but still felt unsure about it, so here we are.

I made a topic called "Beginning or the End Challenge", where people used the previous poster's sentence in the beginning or end of a short story. The last post was April 4th, but I had an idea for it. I waited because I wanted to give other people the opportunity, and didn't want to fill the thread with only my ideas.

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On that same note, don't bring back topics that have been dead forever. This is called thread necromancy (or simply "necroing"). If after a long time you post something new in a topic--one whose discussion has long since ended--that would be thread necroing. We're going to be more lenient about this on the Brandon Sanderson forums, because if you have something to add in the "Mistborn Movie Casting" topic and there hasn't been a post there in a great while, why shouldn't you? You're adding something to the discussion, that's fantastic! A lot of the Books forums will have theory threads, and if you have something to add to them which just perfectly fits the topic, better to revive a dead thread, right?

This is what the rules say. Am I allowed to use my idea now, or would it be better not to?

[Chaos he/him]

This isn't thread necromancy; go for it.