At many points in Moderns lifespan, and for many decks, this was the ace in the hole against decks like infect or Splinter Twin
Unfortunately, its banned in Modern for this reason, but its still legal in Pauper and eternal formats
Turn it face up any time for its mana cost if it's a creature card.) Abhorrent Oculus's additional cost must be paid even if it's cast "without paying its mana cost" or for any alternative cost
or it reduces them, which means you lose lifes
Blue can also be helpful because it has plenty of good proliferate cards, and white got some good toxic creatures in Phyrexia: All Will Be One that could be helpful
In this article, I'm going to share my experience and opinions while trying to back it up with pictures and data