Permission Blue already provides the best permission cards of any color in the game
Let's take a look at Whisper, Blood Liturgist: Just recently, I played in a Masters 25 sealed event where the only match I lost was because of a card called Hells Caretaker
However, you can still cancel all of the damage with your Circle of Protection for 1 mana, because the actual attack is from a red creature
Fischer - $8.91 Reprint From Exodus Culling the Weak allows you to generate mana by sacrificing creatures
Lands, powerful spells, popular commanders, and Reserved List rares can be especially important
They each cost three, have 6 total power and toughness in 4s and 2s, they have one keyword and a tap ability that doesn't cost anything to use like mana or discards to drop your cost of their colors' spells by colorless at sorcery speed by either life lost or gained this turn