>Giant chakram (Sudarshan Chakra)
>A weapon he actually couldn’t obtain in his previous life.
>It seems his proficiency improves with every Holy Grail War, but details are unknown.

>Rama: "Super Ka... Super Karna?! Hm... I'm a tad jealous. Should I take this moment to borrow the power of the magnanimous gods and become Super Rama? Hmm..."

We're definitely getting a Krishna/Rama/Vishnu event or story chapter before the end of the year.