If a creature card has multiple instances of scavenge, you can activate either ability (but not both, as the card will be exiled when you activate one of them)
Commander Sakashima of a Thousand Faces You may have Sakashima enter as a copy of another creature you control, except it has Sakashima's other abilities
Since neither of these cards requires the targeted land to actually be destroyed for its controller to fetch a land, all you need to do is target an indestructible land on your battlefield, and your land destruction spell suddenly becomes a red ramp spell that draws you a card
I'll happily play it in a suitable deck with just one target and think that just 4 equipment is enough to support it in a cube 540ish or smaller in size
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Essentially a form of attrition, you sacrifice your board or become harder to attack because your opponents lose their creatures as well