Forum:Tokens and Massive damage

I am pretty new to YuGiOh, and there are some terms I don't understand. what does 'Inflict Piercing Battle Damage' do (From cards like Big Bang Shot)? And what are tokens? Also, what sets are legal at the moment? Thanks in advance, TurtleFlakes TurtleFlakes (talk • contribs) 20:42, March 22, 2017 (UTC)