What an audience we have here tonight, the great Puzzling SE,
I came here with a small riddle, I hope you are all ready!
Let me put my first hat, a hat with a fat belly,
Now I am a construction block, or tools for cardistry!
Second hat now, keep focused, this one has a big head,
I can be a cacti's attack, or a very rude biped.
And another hat, with a flat top, my last tonight,
To become magic, deceptive, or exchanged for treats on one night.
Now, ladies and gentlemen, I hope you didn't find this lame,
And as I remove my hat, I must ask, what is my name?