Mulligans

Each player starts out with one free mulligan, but each individual playgroup can decide the number of mulligans they want to allow. The current mulligan rule is the London mulligan, where to mulligan the player shuffles his hand back into his deck and draws seven cards, then puts on the bottom of their library a number of cards equal to the number of non-free mulligans they have used. The mulligan rule would work like this


 * First mulligan; Player draws 7 cards and put back 0 cards.
 * Second mulligan; Player draws 7 cards and put back 1 card.
 * Third mulligan; Player draws 7 cards and put back 2 cards.
 * Fourth mulligan; Player draws 7 cards and put back 3 cards.
 * Fifth mulligan; Player draws 7 cards and put back 4 cards.
 * Sixth mulligan; Player draws 7 cards and put back 5 cards.
 * Ect;

There are few cards in magic's history that affect mulligans, like Serum Powder (Figure A). These cards can be helpful, but are bad to rely on.