Horned Troll

Regeneration on an otherwise empty body was green's early-era answer to combat math, and this is the template stripped to its studs: a 2/2 whose single trick is feeding it green mana to shrug off lethal. The design logic is pure attrition. A regenerating body trades up against burn and most spot removal of its time, provided the mana keeps flowing, converting a fragile creature into a recurring blocker that taxes the opponent's answers. But the regeneration shield carries the limitations it always has: it does nothing against exile, sacrifice effects, or the simple expedient of attacking somewhere else, and every green mana sunk into the shield is mana not spent developing your board. The body is small enough that the regeneration rarely tips a combat that mattered; it is a speed bump, not a wall. This belongs to the cohort of commons that taught players what regeneration was for, back before the keyword was streamlined into the rules and largely written out of green's standard toolkit in favor of indestructibility and hexproof. Functional, replaceable, and exactly as ambitious as its rarity intended.