Semblance Anvil

Most cost-reduction artifacts pick the axis for you: cheaper artifacts, cheaper creatures, cheaper spells of a chosen color, fixed by the card's own text. This one hands the decision to the player at the moment it resolves, then keys the discount on a card type rather than a name or a color. Imprint a creature and every creature you cast costs two less; imprint an instant and your burn and counters get cheaper. The two-mana reduction is large enough to swing a turn, and the exiled card is the toll you pay for that size: you spend a card from hand to set the engine, so the discount only earns out in a list dense enough in one type that a single exile unlocks a long sequence of cheaper casts. A scattered deck gets nothing; a focused one gets a recurring tempo edge. The quieter design wrinkle is that the discount cares only about shared type, never color, so the imprinted card and the spells it cheapens can live in different colors entirely, and overlapping types push the math further than the rate first suggests: imprint an artifact creature and you are discounting both your artifacts and your creatures off one exiled card. It is a build-around in the strict sense, inert in a deck not assembled to feed it and generous in one that is.