Constricting Sliver

Oblivion Ring's effect, stapled onto an entire creature type. The exile clause itself is familiar: send an opposing creature away until something leaves the battlefield, and ordinarily that something is an enchantment an opponent can scheme around. Here the leash is held by Slivers, which changes the calculus. The hivemind's defining trait is that an ability granted to one Sliver is granted to all of them, so once this resolves, every Sliver that enters afterward brings its own exile trigger anchored to a separate body. That distributed redundancy is the point. To unwind a single removal-on-a-stick, an opponent has to kill the specific Sliver holding that target, not the creature that printed the ability; clear the board to reclaim creatures, and those creatures come back only at the cost of the whole offense. Note the timing wrinkle: because the granted ability triggers on entering, Slivers already in play when this lands do not retroactively gain triggers, so the deck wants to deploy disruption forward rather than count on a wide board to convert all at once. The 3/3 is incidental; what the card contributes is a recurring, scaling answer that grows with each new Sliver, the closest the tribe gets to interactive removal without ever stepping off its own gameplan.