They have to already be ahead or have a four-power creature, and those are both big asks
There are instances where you need to have the perfect draw to pull a comeback
Ive got a list of things that I think will help you build the deck, and which have a very good chance of inclusion
This is because their effects are always left to chance, and you might not get anything good in return
Its enough for The Raven's Warning to show up occasionally in Keruga Fires decks in Explorer, of all things, but not very often
But declare an attack with JC, and its 10,000 Needles ability balloons it into a massive 10,000-power Freight Train of Death that guarantees it'll deal lethal damage to any creature blocking it or one-shot any opponent if it connects