Faya's Grimoire

At the beginning of your upkeep choose a player at random. Faya's Grimoire does not untap during your untap step.
Pay 1 life, {g}{t}: All players gain * life where * is the number of players +2. Repeat this process once for you and the chosen player.
Pay 2 life, {g/w}{ut}: You can only use this ability during your untap step. The chosen player may activate this ability at any time that player may cast an instant.