I have recently started playing MTG after a few years of inactivity. Decided to jump into Standard as I always loved the format because it was in my perspective a lot fairer for the newcomer.
I used to play Esper control and today I faced a Temur Emerge deck. Now I was completely lost with the emerge mechanic. My opponent casted an Elder Deep-Fiend and when I prepared myself to counter it he said that I couldn't counter. He tried to explain to me everything but I was left with the same thought: "WTF". From everything I find I know that I cannot do anything about the casting cost, but why can't I counter the creature itself?
Like I said, it's a new mechanic to me and for some reason the explanation I got didn't truly make sense to me.
Can you guys shine some light into this matter?