Flowstone Sculpture

A mana sink wearing the body of a creature, built on an old design instinct: when a set wants something that scales with whatever you have left over, hand it a repeatable ability that turns cards in hand into permanent improvements. The discard requirement is what holds the rate down. Every counter and every keyword costs both mana and a card, so the body grows only as fast as you choose to empty your hand, and the trade runs one direction: you spend future card advantage to buy a board presence that does not go away. That permanence is the whole point; the keywords stick rather than wearing off at end of turn, so a few early activations compound into a flier with first strike and trample that a tapped-out opponent has no clean answer to. The Shapeshifter type and artifact frame are mostly flavor scaffolding for the conceit of a creature physically reshaping itself with the materials you feed it. Strategically it is a late-game artifact finisher anchored on a single repeatable outlet: no synergy required, no graveyard to assemble, just mana and surplus cards translated into a threat that outgrows whatever it began as. The ceiling is high and the floor is a 4/4 whose only text is the outlet itself, an idle threat until you have mana and cards to spare. That is the bargain these cards have always asked you to accept.