This card was released in 1999, two years after the first MTG birth celebration card Splendid Genesis
It draws a lot of cards and one costs one mana, what more could you ask for
While -X loyalty costs existed since Lorwyn , Gideon, Champion of Justice was the first planeswalker to have essentially a variable positive loyalty ability where he could gain a different amount of loyalty depending on how many creatures the opponent controls
Again, this How to Build a Command Deck guide and the Commander Deck Building Template are by no means hard rules that must be followed
If you go over 13 mana value, you dont get to cast the spells you exiled
Crucible of Worlds Although a reprint in Core 2019, Crucible of Worlds has not had a real printing since 2007 in Tenth Edition