While the best duelists in the series, like Yugi or Kaiba, alter their original deck as they acquire new cards, the idea behind their strategies rarely changes
A 10,000 Ninja Spinner box gets you 150 cards, including playable Pokemon ex and Trainer cards, at a lower entry point than most HCPs
Similarly, if Starting Town NPC leaves the battlefield while Fetch Herbs is on the stack, that card will still be exiled after the spell resolves, and you'll still be able to cast it later from exile
Anyone that has played a Torrential Gearhulk deck has probably died with copies of Glimmer in hand after missing land drops, and Illumination can help in these worst-case scenarios
Still a mana rock that fits really easily even into formats that aren't Commander
Each player begins the Duel with 4000 Life Points