Brittle Effigy

Colorless removal that answers anything wearing a creature type, available to every deck regardless of color: that is the whole pitch, and the price is paid in tempo rather than restriction. The artifact costs almost nothing to seat on the battlefield, then asks for four more mana and a tap to fire, and the exile clause on itself means the answer is one-shot. What makes the design hold together is that the threat sits on the table the whole time. An opponent knows the gun is loaded the moment the artifact resolves; the four mana and the tap are the cost of pulling the trigger, and the delay is the window in which they get to play around it. Exiling the creature rather than destroying it sidesteps regeneration, indestructibility, and death triggers, so the card answers the things that ordinary destruction cannot, at the price of telegraphing its intent the moment it resolves. The structural ancestor is the slow colorless answer-on-a-stick that any deck can run: a permanent that promises removal and then makes you pay the full rate to cash it in. Where instant-speed colorless exile tends to be expensive or conditional, this front-loads the body for a single mana and back-loads the bill, trading the element of surprise for color-agnostic access to clean, permanent removal that almost nothing recovers from.