I find it hilarious Ashe can't crit Yi or Olaf while they are ulting.
"Can't be slowed."
"When asked if characters who are immune to disables or slows (such as Master Yi and Olaf under effect so of their R will also be immune to Ashe's bonus damage against slowed targets, he noted: 'Currently, yes, these characters could not be crit by Ashe.'"- http://www.surrenderat20.net/2015/04/red-post-collection-discussion-on-Bs
- for the people unaware of this, Ashe is still able to ult Yi... He doesn't go invulnerable to cc. And it isn't just Ashe who gets countered by this; Nautilus vs Olaf is never fun.
"ohhh darn, my adc is going to be pelted by ashe spellshield, ahhhh that's better"
She might not need that counter play. (I mean she is really really sticky at times)
It was probably also unintentional counterplay. Correct me if I'm wrong.