I look like a triangle But, I have four corners. What could I be?

Sometimes a pair of peepers, sometimes a type of nut, is a popular remedy when used with witches.

I have a spine but no bones, has thousands of leaves but no roots. I am the only realm where Success always comes before Work, Death precedes Life, and Tomorrow is found long before Yesterday.

Having a key is not enough for you to go back home. You have to put your key in this too. Not all locks have this.

I come at night, though for some, the day. I'm hours made in minutes, or a vision of the way. I crown you king, or cast you low, Give you flight, or a Summer snow. No door admits me, and none can bar. I rise uncalled from wherever you are. What am I?