If you are playing Limited (i.e. Draft or Sealed decks) then you can have as many copies as you have in your card pool.
Although you may have some trouble finding 200 cards to use in a Limited event :)
If you are playing Limited (i.e. Draft or Sealed decks) then you can have as many copies as you have in your card pool.
Although you may have some trouble finding 200 cards to use in a Limited event :)