I tried searching for the answer but could not get a decisive understanding of what happens . So thank you for your help.

scenario 1 - i activate super transformation attempting to summon white dragon ninja from my deck, my opponent chains MST. What is the process you go about resolving this situation?

scenario 2 - i have a set super transformation plus 1 or more other set spells/traps, my opponent activates heavy storm or a card effect with the simple effect of destroying spells/traps targeting my other card/s (not super transformation). Am i able to chain super transformation to summon white dragon ninja allowing his effect to protect my other set card/s from being destroyed?

thanks for the help