Wu Longbowman

The timing restriction is the entire design. A creature that pings for one is old hat: Prodigal Sorcerer set that template in the very first sets, the blue "Tim" that taps to deal a point anywhere it pleases, at any time. This archer narrows that freedom hard. The damage can only fire on your own turn, and only before you declare attackers, which means it cannot snipe a blocker mid-combat, cannot answer an attacker on the swing back, and cannot be held up at end of turn to threaten a creature into a bad block. What you get instead is a pre-combat clock: clear a blocker, finish off a creature your team chipped down last turn, or burn a planeswalker before the swing, all on your schedule and no one else's. It is the pinger reimagined as a sorcery-speed engine rather than an instant-speed one, trading the flexibility that made the original a beating for a body and ability that ask you to plan a turn ahead. The 1/1 frame underlines the point: this is not a creature meant to win combat, but one meant to rearrange it before combat begins.