War Chariot
A monument to how expensive trample used to be priced. Spend three mana plus a tap, and a creature earns the right to push excess combat damage past a chump blocker, repeatable every turn you can afford it. In the era this comes from, evergreen keywords had not yet collapsed into baked-in defaults; trample in particular counted as a premium attacking ability rather than reminder text, so the design charges twice, once to deploy the artifact and again at every activation. That second cost is the tell. At three mana per swing, the math only profits on a creature large enough that the trample damage outpaces what you spent to enable it, which quietly narrows the card to the green-fatties strategies already inclined toward it. Modern design attacks the same problem from the other side, stapling trample onto bodies and equipment at a small fraction of this rate, which is exactly why a standalone artifact built to hand out one keyword reads as a fossil from another pricing curve. It survives less as a card to play than as a marker of where the cost of combat abilities used to sit.
