Talk:FAQs/@comment-49.213.16.101-20141012003050/@comment-35019468-20141012034414

You can't replace your SIGNI while playing a SIGNI. If you want to replace your SIGNI on the field, you can trash your SIGNI arbitrarily during the main phase, but it won't work if, say, you use Wish Crisis's Life Burst, because it's not your main phase.