Prahv is better since it'll stop all damage from one source to anything, like Blasphemous Act dealing damage to all creatures
Luffy Red/Green Kouzuki Oden Green Donquixote Doflamingo Blue Kaido Blue/Purple Crocodile Blue/Purple King Purple OP02 Paramount War Set two, themed around the massive Summit War at Marineford and the preceding Impel Down arc, introduced Black into One Piece Card Game
The first is that Goyf was (yet again) printed at mythic rather than rare
As for why Insight Engine's price is spiking now, I have no idea - no promising new Proliferate or synergistic Artifact commanders have been revealed since the start of October
If you're going for fastest returns, while CGC might be a little faster, I don't think it's enough to justify over PSA which leads as the central authority
A flash Bitterblossom lets you hold up countermagic and helps play around sorcery-speed removal