Every time you cast a legendary spell from your hand, you get to functionally cascade through your deck until you find another legendary spell with a mana value less than your first spell, then you get to cast it
For more on the best deck size, interesting large deck cards, and an intro to formats and card sideboards too, read on
I especially like this because Im a history student and absolutely love the classics
It's a super-looter that puts my pet commander, Niambi, Esteemed Speaker, to shame -- draw 2, discard 1, and make a pilot, for just 1 mana
You can also play the Elder Dragon in the 99 as a way to untap lands with Lord Wingrace at the helm, so you can ramp into bigger spells such as Torment of Hailfire for the win