Was getting attacked, by a 4/3 had two 2/2s plenty of mana and a strength of will, declared blockers but game did not give me the opportunity to play my instant before damaged was assigned but after blockers declared. That left me losing both creatures instead of not losing any and one of the 2/2s turning the other into a 6/6. Led to me losing 1 of the three of my quick draft allowed losses