I couldn't find the document, but sometime during 1994 the Duelists' Convocation put out the very first mulligan rule
Decks in these formats can cost thousands of dollars, and the formats are kind of designed for veterans of the game
The new side-profile artwork of cards like Mikaeus, the Unhallowed - a six-mana Black 5/5 zombie that not only destroys any human that deals damage to you, but also makes it so that any non-human creatures you control come back to life with a +1/+1 counter on them when they die - are excellent
You can also use the extra life youre gaining to pay for spells with K'rrik, Son of Yawgmoth, or you can activate Aetherflux Reservoir to (most likely) take out one of your opponents
Nykthos Paragon
So, instead, I give you the best way to go based on your goal: For fun : The free methods are your friend, my friend