How does this all work?

[Fish09]

Ok so I have been seeing these cards that need sycnro/tuner cards. What does that mean? For crossroads of chaos i bought a deck and it seems like it is gonna be a, all plant deck. is this trueE? does anyone have a deck from this series? Also Black Rose Dragon looks frieken sweet. So my question is.. is this plant deck gonna be good?

[Brisingr]

You must have got it wrong... you cant make a deck from one booster pack series alone, you have to take the best of all the packs and add your favourite cards to make a unique deck and consider the current meta of your tournament.