In an ideal situation, you would use Lethal Scheme to kill a huge threat, but sometimes the cards are more important
It was known as the Double cycle, as all the cards had Double in their name
There isn't any good direct comparison to Mangara's abilities, but the closest thing that popped into my head is Runic Armasaur, another creature whose card drawing ability is entirely dependent on your opponents' actions, making the card inconsistent where it sometimes draws you zero cards and sometimes floods you with card draw
When you defeat an Ex Pokemon card, your opponent takes two Prize cards instead of one
The star of the show will be Elesh Norn, the white Mana-aligned praetor and ostensible leader of Phyrexias forces on the corrupted plane of Mirrodin
In recent times, the ways in which cards can hold value and be of interest to collectors of the game have really ramped up with all kinds of card variants, from specific foiling treatments to alternate art and even serialised cards