This is typically a blue ability, with cards like Sleep and Assassin Gauntlet, though white gets in on the fun with Blinding Light, Bond of Discipline, and a few others
Plus, if were able to make copies of Hullbreaker Horror with our Krothuss, we can triple, or quintuple Unsubstantiate with every spell we cast
(Of course, like Tarmogoyf, if it turns out you don't actually need that support, feel free to take it out!) And third, when it looks like something is powerful, don't be afraid to try it in places it wouldn't "normally" go
Sol Ring is a legal card, so using Ancient Tomb isnt really a big deal
The way they grayscaled the cards didn't help either, looking dark and murky, especially when compared to mockups made by others, like this one a friend of mine shared on Twitter: Someone in my server took the 20 seconds to up the brightness just a bit and look at the difference it made
Even enchanting or equipping Giant Slug does not make this efficient