You can slap it in a Kenrith, the Returned King deck as an alternate win condition with a slightly worse manabase
It is not possible to pay the additional cost in situations where Shiva is cast without paying any cost in the first place, due to an effect of some kind
When MTG had a big crossover with The Lord of the Rings, we had the famous The One Ring card
If its heads, you can counter a target Instant or Sorcery, and if its tails, then you can copy it and choose new targets
Where VictimizeVictimize brings back two creatures for sacrificing one, Whisper brings back one creature by sacrificing two
This meant not only bolstering Kains power but suiting him up with Equipment to allow me to benefit from attacking under my opponents control