Hoof Skulkin

The repeatable pump ability does one thing, and the color clause does all the steering: a colorless 2/2 whose +1/+1 only ever lands on a green creature. That is the wedge. The Scarecrows of this era were built as artifact creatures with color-coded sympathies, machined to bend toward one color's strategy without ever occupying a colored mana slot of their own. The activation is steep enough that you pay full freight for each boost, so it never threatens to snowball; the green-only mana sink is stapled to a warm body for the turns when nothing better needs your mana. What the card really represents is a design idiom from a stretch of Magic when colorless creatures were handed color-aligned allegiances to reward two-color and guild-leaning builds without bloating their cost. The green restriction is not a drawback so much as the entire premise: it gives a green-leaning artifact deck a creature that grows its real threats while staying splashable in any shell where a colorless three-drop fits. Plain in execution, narrow in reach, and honest about exactly what it is.