Good Riddles

 
easy riddle (medium)

Question: I am important at the most dangerous times. I can not be seen, heard, or smelled. If you use me too much you would fatally die. What am I?

Question: Look at my face, I am somebody. look at my back, i am nobody. What am I?

Riddle #482 (medium)

Question: What type of cheese is made backwards?

Riddle #1259 (medium)

Question: Crawls over pages and fells wild beasts.
Helps guide you along in your home and on streets.

What is it?

Hard Riddle (medium)

Question: Permanent feature and teacher, unless it results in you being buried by the preacher - what is it?