At five mana, or four with Sneak, this is a tempo conversion engine, not a topdeck. The line: you attack with something smaller (a chipping 2/2, a deathtouch threat the opponent has to respect), and during declare blockers you return that unblocked body to hand and replace it with a 6/4 deathtouch attacker already mid-swing. The bounced creature never deals its damage that turn, because Sneak pulls it back before combat damage; what you buy instead is a fresh, larger body crashing into a board that already committed its blocks elsewhere, plus a free deathtouch handoff to another attacker that makes any remaining block a guaranteed kill.
This is a P1P1 in any black deck and a high hold the moment you're cleanly in black, around P1P3 or earlier. The two homes draft it differently. WB Legends wants it as the curve-topper that closes after Mechanized Ninja Cavalry and the hybrid two-drops chip in early; Sneak converts one of those connecting bodies into a finisher without ceding the board. BG Food prizes it as a singular threat in a deck already trained to think in sacrifice and body-conversion terms, where the deathtouch pointer makes a surviving attacker lethal into a gang-block.
The removal suite pushes back hard. Stomped by the Foot kills it on sight, and Grounded for Life punishes the Sneak line specifically: Shredder enters tapped, and Grounded for Life costs less against a tapped creature. Even then, trading removal for a Sneaked Shredder is a clean one-for-one, since the bounced attacker is already safe in hand. Maindeck every copy, bait removal first, and don't Sneak him into open black mana you can read.
