the 10- champ at worlds played LBS, does anyone really care what the 10- champ played? I find the 10- champs to be little version of their big brother, playing a deck they made, and playing that deck like robot, of-course they are 10- players that make their own decks, but they have a very low win chance, not saying that any 10-er here should go to his bro asking for a deck, do it yourself, enjoy it, you're too young to be really competitive, enjoy your youth
There are a lot better card in the format nowadays, 10-, maybe 11-14 if played with a decent combo is the only place I'd see T-tar ex d win