Seven-Tail Mentor

The counter comes twice: once when it walks in, once when it leaves. That symmetry is the whole design idea. Most enters-the-battlefield growth effects pay out on arrival and give nothing on the way out, which makes them awkward to trade away; here the death trigger turns a chump block or a sacrifice into a second counter, so removing this body still leaves a counter behind on something you control. The effect targets a creature or Vehicle, the tell for what it was built alongside: a permanent-counter payoff sitting in a color that likes wide boards and mechanized fodder. It plays cleanly with sacrifice outlets, where the death trigger is a feature rather than a cost, and with recursion, where each loop of enter-and-die is two counters instead of one. The 2/3 body is deliberately modest: the value is meant to accrue on the rest of the board, so the counters are the payload and the Fox Samurai is just the delivery mechanism. Even on an otherwise empty board it is not dead, since the entry trigger can land its counter on itself, bumping the 2/3 to a 3/4; but the card wants a developed position, because that is where the death half of the equation has a legal target at all, since a lone creature dying leaves the trigger with nowhere to go. It is a growth engine that pays out at both ends of a creature's life, and the back-end payment is the part earlier white counter-granters never had.