Kor Scythemaster

A 3/1 body that hits first when it swings is a familiar tension in white aggro: the card wants to be racing, but a 3/1 dies to nearly everything, so the conditional first strike is built to make the trade go your way during the one phase that matters. Attacking, the Scythemaster picks off any blocker with three or fewer toughness before it can swing back, which turns a fragile one-toughness frame into a real threat against ground stalls. On defense it gives all that back: the first strike vanishes the moment it stops attacking, so blocking with it is just a 3/1 chump, and the card knows it. That asymmetry is the whole design point. The "first strike only while attacking" template pushes small creatures forward without letting them harden into walls, and this is a clean color-pie expression of it: white gets an aggressive curve-filler that rewards commitment to the attack step rather than rewarding it for sitting back. The Ally tag folds it into the cooperative go-wide builds where a 3/1 attacker suits the plan and the lifegain-and-counters payoffs cover for the soft body. On its own it is a straightforward common, an aggressive white beater whose ceiling is whatever the tribe around it provides; the conditional keyword is what keeps it honest about which half of the battlefield it belongs on.