Who the fuck is FOAF?
No anti-incrimination clauses here, its pointless, annoying as hell for the reader, and I guarantee it wouldnt hold up in court.
And "sass" is "molly". Its a type of MDxx made from sassafras. Molly is almost always just MDMA (IF ITS REAL!), while sass can also be MDA.
"molly with sass in it" sounds like complete and utter bull shit though. More than likely is that your dealer is trying to sell you some really bad fake shit (piperazines, MDPV, mephedrone, and more random nasty chemicals), and is trying to explain the difference in highs by saying it has "sass" in it.
DO NOT BUY ECSTASY WITHOUT A REAGENT TEST.
unless you like being a guinea pig for your dealers shitty research chemicals.