MTG: What happens if I use aura finesse to attach mind control to an attacking creature?

Ryan

New member
My opponent summons kozilek. he then declares his attack. when he declares the attack, i use aura finesse to attach kozilek with a mind control i have on another of his creatures. will this 1) cancel out the attack and i don't have to sacrifice, 2) makes kozilek be attacking FOR me, causing him to annihilate, or 3) kozilek's attack is negated, but i still have to sacrifice?

and yes. i know i could have saved a lot of trouble by just doing this before he declared the attack, but i wanted to see if it would work in my advantage. Thanks in advance for any help.
 
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