Fogwalker

Skulk and the enters trigger pull in the same direction, and neither is loud about it. The 1/3 body is built to slip past the ground: skulk waves it through any creature with greater power, which on a frame this small means most of the board, while three toughness lets it block 2/2s all day and survive the swing back, sitting in front of a developing attack rather than racing under it. The enters trigger is the disruption half, and it works on the back end rather than the front: it doesn't tap the target, it only denies the next untap step, so a creature that's already standing can still block the turn you cast this. The payoff comes a turn later. Spend the trigger on an attacker the turn after it swings, or on a blocker that's been tapped to attack or pay an activation cost, and it stays sideways through your next combat, opening a lane skulk was already leaning on. That timing dependence makes it a creature for a board with one key defender on it rather than an empty one: the untap-denial is worth most when the opponent has exactly one creature you need pinned down. Stack the two halves and you get a recurring one-point clock an opponent can't cheaply trade into, plus a one-shot lock holding a problem blocker out of position long enough for that clock to matter. Quiet by design, and it asks for patience to collect full value.