Vulshok Replica

A colorless body that converts into a burn spell the moment you decide it would rather be three damage to the dome, and a textbook artifact-block compromise: every color gets access to a stapled effect, but the activation cost stays in the color that owns it. The 3/1 frame is a deliberate liability, not a feature; this is a creature only until you cash it in. As an attacker it dies to anything, but the sacrifice clause means a chump block or a removal spell aimed at it rarely robs you of the value, since the threat of activation stays live. What the card actually does is stash a Shock-plus-a-body in a deck that runs no red beyond a single source: the artifact creature slot lets a blue or white shell hold reach it could not otherwise cast. The damage points only at players and planeswalkers, never creatures, which keeps it honest as a clock-closer rather than a Swiss-army answer; a blocker is safe, only the life total or a walker behind it is exposed. Fixed-rate, fixed-target designs like this one age quietly: never the best three-mana play in any era, always a serviceable one when a deck's gaps line up with what it offers.