In Double Feature I would highly prioritize hard removal spells
As for the waterbending cost, the additional artifact tokens, creatures and lands really bring the cost down to a manageable amount that is way easier than waiting for the next full moon and put the Secret of Bloodbending on this list as one of scariest things you can pull off
Scurry of GremlinsScurry of Gremlins (3,366 Inclusions, 1% of 517,635 Decks) Now this is what I'm talking about
Vector barely survives by using a trap to mitigate the damage, making it a Senseless Sacrifice
But other times it's nice just to have the staples AND some fun stuff, particularly as someone who doesn't actually play the game lots and so has fewer opportunities to try things out
I have no idea the value of something like this, but when any of us pick something as rare as this up, we can worry about price then