Port Roose Bolton to cost/target API (#1320)
Port Roose Bolton to cost/target API (#1320)

And kill targets simultaneously.
DukeTax/throneteki,DukeTax/throneteki,ystros/throneteki,Antaiseito/throneteki_for_doomtown,cryogen/throneteki,cryogen/gameteki,Antaiseito/throneteki_for_doomtown,cryogen/throneteki,cryogen/gameteki