Labor leader and soon-to-be opposition leader Shelly Yacimovich declared Monday night that her party would lead the opposition with "energy and with faith," after Prime Minister Binyamin Netanyahu struck a deal with opposition leader Shaul Mofaz that will draw Kadima into the coalition. "We have been given a rare and important opportunity to head the opposition, and we will do so with energy and with faith," she said. "It is a covenant of cowards between Netanyahu and Mofaz," Yacimovich said of the agreement, which was announced late Monday night just as a bill to dissolve the Knesset was headed to the plenum for its final reading. "This is the most ridiculous, disgusting zigzag in Israeli political history," she charged. Labor MK Isaac Herzog said the unity government gave Labor a prime opportunity to lead the nation as the main opposition party. Speaking with Israel Radio, Herzog said he was confident the Labor could now win in elections in 2013. Yair Lapid - whose just-founded Yesh Atid Party was seen as a chief rival against the centrist Kadima - also slammed the unity government proposal, calling the new coalition a "disgusting political alliance."