Talk:Master Yi/@comment-186.137.66.4-20120310175334/@comment-88.186.19.90-20120311230615

There's a difference between slow immunity and diminishing returns.

Immunity to slow is what it says on the tin: your MS can't be reduced in any way.

Diminishing returns isn't a reduction of your actual movespeed, it's a reduction of the increase in movespeed due to an item/ability. Hence the immunity doesn't apply.