Niblis of the Mist

The enters-the-battlefield tap is a tempo line dressed up as a creature: a flying 2/1 that arrives and taps down a would-be blocker, buying a clean swing. The body and the trigger are deliberately modest, which is the point of the design. A tapper that taps on entry, rather than as a repeatable activated ability, gives you exactly one window of control: the moment it lands. There is no choosing your timing later, no holding it up at instant speed; the value is front-loaded and spent immediately. That makes it a fundamentally aggressive piece of the white Spirit lineage rather than a defensive lock, since the most natural use is to clear a path for evasive damage rather than to grind out repeated taps. Compared to the recurring tappers that loop their effect every turn, this trades long-game control for a cheaper, evasive body that contributes its own clock. It is common-rarity tribal filler built to reward flooding the board with small flyers, the kind of card whose ceiling is decided by how many other Spirits sit beside it rather than by anything it does alone.