Mesra, Stitchmaster

Creatures you control have stitch. (Add together the power of two creatures, at least one with stitch, and the toughness of those two creatures. They become one carrion creature in addition to all abilities and types of the stitched creatures.)
This creature may stitch once with a creature an opponent controls and the resulting carrion comes under your control.
{2}{b}: Create a black 1/1 Carrion creature token with stitch.