If you have the staples of your target archetype: Go ahead and spend the rest of your gems on secret packs of the corresponding archetype
During the End Phase of the turn this card was activated, if you control a face-up Spirit Monster, you can return this card to you deck, and if you do, add a "Sigil" Spell or Trap Card to your hand, except Sigil of Temparance.[/spoiler] [spoiler=Sigil of Justice] You can only control 1 face-up 'Sigil' Continuous Spell or Trap Card
If this card on the field is destroyed by an opponent's card and sent to your Graveyard: Inflict 1000 damage to your opponent
I was shocked that it wasnt included in the precon, and its an easy and important upgrade
When Joey is encouraging Yugi to Duel Kaiba, in the dub he tells him he is the best Duelist he has ever seen while in the Japanese version, he reminds Yugi that he was the one who helped him turn his life around (a reference to the manga)
Iron Hands ex is iconic for its silly yet powerful move, Amp You Very Much, and this makes it quite a valuable card