Collector Boosters are the main event, though
Unlike conditional counters, it never sits dead in your hand waiting for the right target
Just remember that Rex's ability is compulsory, so make sure it isn't alone on the field with any 0-cost cards or you'll lose them
Based on what Ive seen so far, you could do worse than a mono-ruby deck all about Sid and the toys he tortures for fun, but you can also dip into emerald or amber (preferably amber) to get access to a wider array of toy tools to play with
The goal of this deck is to raise Vadrik's power to 3, then storm off, generating mana while drawing through our deck until we assemble a game-winning combo
When you are able to play this you generally have weaker monsters and hoping to copy something big they make