Thor, Asgard's Avenger
Damage amplification usually rides on a single vector: a pinger that adds one, a combat-only pump, a burn spell that scales itself. This generalizes the plus-one to every source you control that touches an opponent or their stuff, and it does so additively per instance rather than doubling a lump sum. Ten attackers each hit for one extra; a chain of small burn spells each land one more; incidental triggers all pick up the rider, and none of it is restricted to any one color of source. Because it applies per source rather than per turn, breadth compounds it faster than depth: a wide board multiplies the effect in a way a single big threat never could. The load-bearing constraint is the word "another": the God's own combat and abilities get no boost, so its 4/4 flying body is the honest floor while the payoff lives outside it. That one-sidedness also marks the difference from a Furnace of Rath, which multiplies damage symmetrically and burns you along with your opponents; here the effect is asymmetric and cumulative, rewarding quantity of sources over the size of any one. The line reads modestly, but it quietly rewrites the arithmetic of every subsequent point of damage you deal, turning a swarm of cheap threats and incremental pings into a lethal clock quicker than the raw numbers suggest.
