Talk:Lykos (Howl towards the Moon)/@comment-177.33.127.197-20140924140749/@comment-1465604-20140926013319

You cannot use half MP if the period has passed. I.e., you cannot camp the screen and wait 'til 30 MP has been regenerated and then start the quest for 30 MP if the period of time during which half MP is on has already passed. The game will check with the server, which regulates how much  the quests costs and notice that you're 30 MP short.