ritual cards mtg Exclusion [New Phyrexia] The Gathering Birthing Ritual #337 holo from

As another example, if my opening hand has a one-drop, a two-drop, a three-drop and four different four-drops, then I will usually bottom the worst three four-drops in the hope of drawing into a powerful five or six-drop, while keeping the cards that will ensure a perfect 1-2-3-4 curve-out

Once the ability has resolved, however, the creature can't be blocked even if its power is increased above 2

It acts as a way to shut down a potential attack, but also allows you to protect your creatures in a bind

I also love it on Commanders with toughness and least two bigger than their power just randomly like Ishkanah, which is also good since Spiders often are bigger butts