Magic is a weird game with a long history
Though at first glance, Karador may seem costly at eight mana, this Abzan (black/green/white) commander costs one mana less to cast for each creature in your graveyard, meaning it will most often be cast for its minimum cost of three mana
Pathways, Triomes, Slow Lands, etc
For more on Magic: The Gathering, check out what Wizards of the Coast had to say about rumors that the Spidey set will only see a single print run
It can be quite a job to keep track of 1,000 cards when you only need 60 to 100 for a deck, but the open source application Magic Assistant makes managing your Magic collection easy
Theres no strict upper limit here either, but again, adding so many cards can water down your best spells and make your deck less consistent