mtg shadowmoor cards Gravelgill Axeshark [Shadowmoor] 1(BR)(BR)(BR) Magic the Gathering Shadowmoor Single

Blue fetches are often the most in need, and dropping the price of this one is pretty sweet

Depending on your assumptions, doing 100-140 ranked drafts to get 4x each Rare was in the right ballpark

While Im not sure if it truly makes the cut in cEDH, you could also cast Return the Favor to make your own copy of the enters-the-battlefield ability of Thassas Oracle to win on top of their ability on the stack

Counter Intelligence Counter Intelligence takes us to the sci-fi world of Sothera with a Jeskai deck focused on Charge Counters and Energy

However, you're still the player that cast Hellish Rebuke, so the ability will trigger whenever one of those permanents deals damage to you, not the player who controlled Hellish Rebuke as it resolved