The deck no one ever plays anymore.
tron" is/was an infamous deck used in the popular TCG Magic: the Gathering
, in the old Type 2 format. (All sets from the Eighth Edition and up. The current Type 2 as of this writing is Champions of Kamigawa through Ravnica:City of Guilds sets of cards.)
It is typhically based around the "Urza" land cards, basically lands with the word "Urza
" in their name, combined with a lot of overpowered expensive cards in an obnoxious way. It was also probably used in every single major tournament, and hated by people who can't afford/don't know how to use it.
Anyone who runs Blue Urzatron in the current format at the time of this writing probably has no idea what they are doing.