Forum:Chained MST to my set spell being activated

Ok, so I was playing a tag duel with my friends the other day. I had set 3 cards on my last turn, one of which was miracle fusion. In my next turn I saw a way to kill one of my opponents, but it required me activating miracle fusion. So I said, "I activate miracle fusion" and flipped the card face up from my spell/trap zone. My opponent (the one I was not going to kill) then said, "before you activate, I chain MST to kill your card." We basically got into a 10 minute argument about it, which ended with the ruling in my favor. But the next day my friends decided I was in the wrong with saying (short version) "I already declared my activation of my spell, so my friend can not say he wants to destroy it before I activate it."

Can someone please tell me I was in the right? Cause my friends won't leave me alone about this. Please and thank you

Brony2 (talk • contribs) 02:56, September 5, 2015 (UTC)Brony2