Hmm, hands into snakes. I wonder if that'll be a more effective way of eating. You know, like do homework with one hand and then consume food with the other. Fascinating, fascinating.
Anyways, Dual-Headed Snake? No problem. Allow me to first draw blood by delivering a cut onto my index finger, drawing the leaking blood across the length of my Snake tattoo and then performing the standard sequence of the handseals boar, dog, bird, monkey, and then ram. Then I'll just slam the ground before Akasha-sensei, inducing just enough chakra to summon the B-Rank Snake...oh, would you look at that! That dual-headed snake doesn't seem too pleased to be summoned. There's a dead mouse in one of its mouths. Seems like a fresh kill, as well.