You ' re ignoring the entire game and focusing only on the flurry turn . No I didn ' tyou don ' t need a weapon , and a buff and the Flurry all at once you can hero power , wait for a buff , cast it , wait for Flurry then cast it , spending only the mana you would have left over anyway . spending only the mana you would have left over anyway that ' s the important part . Again , the issue wasn ' t price overall , but efficiency . The entire combo can be broken into small parts of lowmana , meaning you can play them on multiple turns at no real tempo loss . Sure , you ' had to keep a dagger alive ', but with it being your hero power , that ' s nothing to a Rogue , compared to a Warrior keeping a weapon alive or any other weaponsclass . And most people usually have 13 mana left over at the end of turns anyway , so you only need to play those cards on turns you have mana left over anyway . And if you ' re playing Oil Rogue properly , there shouldn ' t really be a shortage of weaponsbuffsweapons in your hand in the first place . It ' s a problem if you only have one weaponsbuff card in your whole deck , but that ' s not how you play Oil Rogue anyway . And rogue had to think Do I kill that minion or keep my dagger in hopes I get a buffflurry . And if I ' m wrong I ' m probably dead . So it ' s more like they had to think Do I kill that minion or keep my dagger in the hopes I get a buffflurry ? Oh well , I have 2 mana left over anyway , so I ' ll hit the minion and rearm and be ready next turn for the combo if I get it . most of the time it ' s very rare any class consistently spends all of its mana , and Rogue is one that usually has leftover manacoins aplenty . So nah , it ' s not really an issue to keep hero poweringusing a new buff across multiple turns as once you ' ve got rid of one weapon , another better base weapon may turn up anyway that you can play early , and that ' s the joy of Oil Rogue you could easily set up the combo on any turn , use it up , yet have it all ready again in no time at all using only mana you wouldn ' t have spent anyway .