Lithoform Engine

Copy effects have historically lived on individual spells built to do one job: Fork copies instants and sorceries, Rite of Replication clones permanents, Strionic Resonator duplicates triggers. This artifact collapses all three into one permanent and charges by mana instead of by card, turning copying from a one-shot payoff into a repeatable fixture you can tax every turn. The lever that keeps it honest is the tap symbol combined with the escalating costs (two for an ability, three for a spell, four for a permanent): each activation asks which piece of your board is worth the most to double, and a single Lithoform Engine gives you one copy per untap by default. That "by default" matters, because the tap is a soft ceiling rather than a hard one: any untap effect (a Voltaic Key, an Unwinding Clock, a well-timed Twiddle) lets you fire the same ability multiple times in a turn, and the legend rule is the only thing stopping you from having two copies in play at once. The subtler value is the "choose new targets" clause, which quietly converts the card from a pure duplicator into a redirection tool: copy your own removal and point it somewhere new, or copy an enters-the-battlefield trigger and aim its second instance at a different piece. Because it works on the stack rather than the battlefield, it cares only that you generate value through abilities and spells, not what colors produce them.