Citation :
In a game of N players, the process ends when all N players in sequence (starting with you) choose not to put a card onto the battlefield. It doesn't end the first time a player chooses not to put a card onto the battlefield. If a player chooses not to put a card onto the battlefield but the process continues, that player may put a card onto the battlefield the next time the process gets around to him or her.
extrait du gatherer de Hypergenesis.
et donc tant que quelqu'un a quelque chose à poser, il le fait, dans l'ordre du tour.