Once you've started casting a spell as Colossal Dreadmaw, it's too late
Under the "old" rules, you did not die until the end of the current phase (regardless of your life total), so you could Contract all day long even at zero life and simply cast a game-ending Drain Life to decimate your opponent
With several expensive Diamond & Pearl sets to compete with, Majestic Dawn puts up a respectable fight with some top-tier banger cards to satisfy your urge for Eeveelutions, pseudo-legendary, and legendary Pokemon
We can use any of the three extra turn spells, and we can also use Isochron Scepter to copy them
With an Ink cost of 3, 2 Strength, 3 Willpower and 1 Lore, Ursula doesnt look great at first glance