Puffer Extract

A pump effect any deck can run, no matter its colors: dump arbitrary mana into one creature for a swing that scales as far as your mana goes. The death clause is what pays for that universal access. The creature gets destroyed at the next end step regardless of what happens, so you are renting damage, not buying it, and that single restriction reorders how the whole card is used. The natural target is a creature you were already going to lose, or one you can sacrifice for value before the end step arrives, turning a doomed body into a finishing blow or a final block. Tokens and recursive threats sidestep the downside entirely, since their loss costs nothing. There is also a timing wrinkle worth knowing: the +X/+X lasts until end of turn, but the destruction fires at the next end step, so a creature pumped on an opponent's turn dies on their end step rather than yours. That matters when the activation is doing defensive work as a blocking trick. As a five-mana artifact that still demands a separate X investment to do anything, it is slow and hungry, which is precisely the toll for handing every color an effect that colors usually charge a premium to access. The forced destruction is the toll that keeps the rate fair across all of them.