Once again, the last trigger on the stack is the first one to resolve
If activated, you can KO a 3-cost Character and ramp 1 Don
When they're not screaming or hiding, there's a good chance you'll find them testing their metal in metroidvanias or just admiring their Pokemon TCG collection
But what Supernovas fit perfectly for your blocking purposes
It's theoretically possible that, if you were to weigh literally thousands of packs to choose your heavy favorites, and bought hundreds of them, you might get a slightly higher pull rate of rare cards than if you bought the same number of random packs - but I don't recommend it, for two main reasons: Most game stores don't permit you to weigh individual booster packs before buying them - mostly because it takes a long time and holds up the line
Interestingly enough, all three cards - Fight Rigging, Not of This World, and Sarkhan's Unsealing - are within the color identity of the Final Fantasy 7 deck, so it is possible we could see them show up as reprints