Thoughtseize and Duress on turn 1 are fantastic, but they're also fine draws later in the game
The first thing to consider is where you want to sell your cards
This six mana creature lets you keep everyone's creatures alive, in a way, by bringing any nonartifact creature that dies back to the battlefield under your control face down, but as a 2/2 Cyberman artifact creature
The first couple years of Yugioh TCG were filled with non-effect monster cards (many of them terrible competitively) that would eventually be phased out in favor of effect monsters and other cool stuff
By looking at what similar cards have sold for in recent auctions or private sales, you can better understand what your card may be worth
Brawl Not Legal Vintage Not Legal Timeless Not Legal Commander Not Legal Pauper Not Legal Oathbreaker Not Legal Penny Not Legal Bow to My Command Ongoing Scheme (An ongoing scheme remains face up until its abandoned.) As you set this scheme in motion, choose an opponent