You are nerfing kalista?!

Source?

i seen nothing bout nerfing kalista

The devs have said explicitly that champions like Kalista, Azir, Ryze, and possible Taliyah are going on the backburner because of how difficult is has proven to balance them for all levels of play while keeping their main identity intact. Their time is better spent making new champions and reworking old ones that they know they can make real headway on.

I wouldn't expect any changes to these champions aside from major, general passes for many months, possibly over a year.