sounds like X to me. either some double or triple stack pills. the smiley usually tells you the strength or the manufacturer stamp he uses on the pill. so be careful when buying these and ask questions first. hope this helped
hi i tried green ones, clean pills(I dropped 2 of them / no hangover) but i think they are methylone contained. Because i didn't catch the intense euphoria. Also my friend tried yellow ones(as same as in your picture). He likes them.