What champion would be OP if you replaced his/her passive with another champions passive?
Heres some i can think of
passive is replaced with
or
passive is replaced with
passive is replaced with 
Heres some i can think of
passive is replaced with
or
passive is replaced with
passive is replaced with 
Veigar's
passive on Fizz
.
http://i2.kym-cdn.com/photos/images/original/000/913/956/042.gif?noredirect
Imagining 1.5k AP Fizz now......
Kled's passive on Quinn or Graves.
Passive is replaced with 
on 
On 
Why? Just why?
Every tick of singed's q apply one stack.
http://i3.kym-cdn.com/photos/images/newsfeed/000/494/455/f31.jpg
Yeah i got the singed q part im asking why would you want to watch the world burn?
Tryndamere's replaced with Olaf.
But then them crits........
on
or even
on 
on 
on 
on
.
Mex i think Ekkos passive is stronger cause slow + ms
passive on

's on 
on 
welp, every squishy is now even more fucked.
And Rengar gets one of most useless ultis ever
passive on 
Now she only needs 2 crit items for 100% crit on her ultimate, plenty of extra movement with her W, shield protects her W from being dispelled as well.
But then she'd lose her original passive, which is very important for her considering her low base AD
Her ratios are pretty huge, though. Particularly after Armor Penetration. So with 2x crit, she can buy more straight AD.