Step 1. Take Cosmic Insight +5%CDR
Step 2. Take Ultimate Hunter +15%CDR
Step 3. Other team takes 2 drakes, Cloud map happens.
Step 4. Your team gets 4 drakes
4 drakes is 40% CDR, 45% CDr with Cosmic Insight
That's 85%. Ultimate hunter is another 15% that's 100%.
It's unlikely yes, but really all you need to do is go Ultimate Hunter and Cosmic insight in a few games and then make a comeback in a cloud map.