Magic: the Gathering Rules apply.
this variant you must build a deck with only creatures and lands in it.
Any creature or land that taps for anything other then to produce mana
You can have a 15-card sideboard.
& Restricted List
playing this variant it is usually decided what Type you will be
playing. So, if you are playing Type 1, Type 1.5, Type 2, or Extended
Creaturefest then, follow that format’s Banned and Restricted List in
addition to this list.
“Paris” Mulligan is used for this variant.
Before each game begins, a player may, for any reason,
reshuffle and redraw his hand, drawing one less card. This may be
repeated as often as the player wishes, until he has no cards left in
his and. After the participant, who plays first, mulligans as often as
he likes, the decision of whether to mulligan passes to the other
player. Once a player passes the opportunity to mulligan, that player
may not change his mind.