[Item Concept] Mantle of Fate

Mantle of Fate

250 health 65 MR 10% CD

Unigue passive: All true damage you receive is converted to magic damage.

+ + = 800+720+450 = 1970 + 730 = 2700 Gold

I have been thinking about what other items a lol could use and I came up with situational defensive item that would provide a nice layer of protection for tanks againts heavy true damage dealers such as Yi, vayne or maybe olaf.

Tell me what you think? Would you buy it in some matchups? Would it be too strong or too weak.

[vayne-pose]