Saturn surrounded by his "Flames and Black Lightning"plus the whole Island emitting lightning as well
Just like what he is doing on Egghead right now.
Fact is Roger ,and Rocks where at God Valley so both of them must have seen Saturn or had a run in with him.
Ngl this makes Saturn even more scary imo
Just a stretch what if Rocks and Roger fought Saturn with the help of Garp ,because everyone saw Saturn in his Zoan form.
What if even CD‘s aren‘t allowed to see him like this?
Saturn wanted to get rid of everyone ,even CD‘s and Slaves ,that‘s why Garp and Roger protected the slaves and CD‘s.