An Infect style riff on Sign in Blood

Hm. In almost all sets the poison doesn't matter, but then, it's probably still not too good for UB.

­Counsel of the Soratami with replaced by is probably just about printable. And this is a wordier version with exactly the same effect, so yeah, seems okay.

Exactly. A more serious advantage is that it can also be a finisher in a black-blue infect deck, but that's probably still ok. (Rosewater's articles say they printed few target player gets a poison counter instants/sorceries, but they did print some, and this is notably hampered in that it can deliver the 10th, but you really, really don't want to give someone the 9th with it :))

Plus, you can always play it on yourself - especially if your opponent isn't running infect and you are stalled.