BRG is full of small aggressive creatures (Gene Pollinator, Greedy Freebooter, Callous Inspector, Biotech Specialist) so a second set of Vicious Rivalry sweeps their early board cheaply. The extra Duress copies strip their removal or Strategic Betrayal before they can use it on our key threats. Winternight Stories and Awaken the Honored Dead are too slow against a deck built to curve out and apply pressure every turn.