1 2 3 4 5 6 Designers & Dragons
Since it was only printed for this set, it's a pretty hard card to come by
A few Dinosaurs also help out here, with Trumpeting Carnosaur offering an expensive Lightning Bolt, Bronzebeak Foragers exiling a non-land permanent for each opponent, and Apex Altisaur challenging folks to fights they'll almost certainly lose
This format is ideal for learning the mechanics and interactions of a set, as it allows players to build a small synergized deck
Minn, Wily Illusionist creates illusion tokens that get more powerful for each one you control, and when they die you can possibly play cards from your hand for free
Three Steps Ahead This 3-mana counterspell is kind of a DIY Sublime Epiphany that does quite a bit less for more mana