Its very unlikely the card is going to be unbanned in Modern and Pioneer, so your best bet is to use it in Commander instead
Discounting activated abilities of of lands you control by 1 is pretty significant and makes cards like Nykthos, Shrine to Nyx (currently ruining lives in Pioneer in a mono-green deck, coincidentally) and Cabal Coffers that much easier to abuse
For reprints, especially at rare or mythic rare, that caused some frustration
Win Condition And Weaknesses The primary win condition of Kuja is through burn damage
Very pricey for the simple bounce effect that it can do, made worse since you need white and blue to do the trick
Because this card does require at least one other card to access the card you fetched up, it just cracks the top 10, but the rate of one black mana to tutor any card is still too efficient to ignore