So you are seriously telling me that 
will begin channeling his ult with 
channeling his and as soon as they arrive, a whole 5 man team comes from no where and is invulnerable for a little bit, enough time to get shit like 5 kills in fountain? yea, thanks. (just assuming fountain doesn't kill while has ult up, even if it does, woopdie do, its anywhere else on the map now.)
So you are seriously telling me that
nopenopenope free penta!
The fountain ignores invulnerability. It's pure damage instead of true damage which does damage once it targets something REGARDLESS of whatever the character uses in an attempt to mitigate it.
