I was just looking over the new Kroger ad which starts tomorrow, and I noticed that General Mills Cereal is included in the Buy 10 Get $4 off sale. It very vaguely states "select varieties" so I have no idea what cereals will be included. There are a few .50 off coupons out there that will triple, so you can potentially get .49 cereal if these kinds are included:
Reese's Puffs -.50 off here
Original Cheerios -.50 off here
There are also numerous $1.00 off 2 General Mills cereals from the newspaper and online.