This unassuming rodent, printed in Return to Ravnica, basically required an immediate answer, or it would multiply out of control, each copy making the rat horde, and the rats themselves, grow bigger and bigger
Brainstorm There are lots of reasons that Brainstorm tops our table, as well as many others out there
Boros has access to a lot of tricky spells, and even if that mana has mostly been spent on Avacyn, theres more cheap interaction that can mess things up, including new format stalwart Deflecting Swat, which can come down for free
Barkhide Mauler is a Beast
Many players plan to purchase these sleeves again in the future because of their proven reliability and durability