10 Cover Of Darkness Any Creature Type Can Start An Assassin's Guild In The Right Lighting While typal decks have struggled in Modern over the past few years, providing all of your creatures with the Fear keyword is a great way to end a game quickly in the case that the board is starting to stall out
This is going to help you pop off in storm decks, and its going to allow you to tuck a few removal spells under it and then just repeatedly cast them on later turns to close out a game
Casting a spell requires an investment of mana
However I did draw a hard line around cards which primarily serve to mill your entire deck into your graveyard in one go: Hermit Druid, Cephalid Illusionist, Balustrade Spy, and so on
Why would anybody use that as a metric for determining the value of their cards when low and median exist as options
And just in case, since protection is a tricky keyword: The bonuses that Sword of Fire and Ice provide do have synergy protection from a color not only protects against removal, but also lets you bypass blockers from that color