Lotoki, Master of Corruption

Whenever you play Lotoki, Master of Corruption, you may pay {p/c} instead of every {1} you would pay.
Whenever an opponent loses life, the next spells you play this turn cost {1} less and {p/c} more.
Whenever you lose life on your turn, the next spell you play this turn costs {0} instead of {p/c}, {p/w}, {p/u}, {p/b}, {p/r}, or {p/g}.