Solphim, Mayhem Dominus

Damage doublers used to be a fragile, splashy trick: enchantments like Furnace of Rath and Gratuitous Violence sat on the battlefield doing nothing until you found a way to point burn at a face. This one puts the effect on a body that also blocks and attacks, and narrows the doubling to matter where it counts most, noncombat damage aimed at opponents and their permanents. The narrowing is the design discipline: it does not amplify combat, so you cannot cheese it by swinging with a large creature, and it does not turn your opponents' own sources against you. Every burn spell, every ping, every direct-damage payoff arrives at twice its printed number, which turns a life total into working capital rather than a resource to hoard. The Phyrexian mana on its second ability is the tell for how the card expects to be played: paying life for the indestructible counter is on-theme for a red deck already spending its life total as ammunition, and it protects the doubler through a sweeper or a targeted removal spell while the discard cost feeds a graveyard the deck likely wants full anyway. As a Horror that both closes games in combat and quietly rewrites every burn spell you draw, it earns its slot even before the multiplication starts.