Hydraulic Helper

A wall that only ramps toward its own kind. The blue mana it produces cannot be spent to cast a nonartifact spell, but that clause is narrower than it first sounds: the restricted mana still pays for activated abilities, artifact spells, and any cost that isn't casting a nonartifact card. What the restriction actually buys is a defensive body that never has to sprint. That is why this reads as a 2/3 with Defender rather than a fragile little dork: it is not built to accelerate a diverse curve, it is built to sit back, absorb early pressure, and pour its walled-off mana into the next artifact or the next ability that wants it. The Defender keyword and the color-locked mana are two expressions of the same intent, an engine piece that promises to stay home and pay you only if you commit to the theme. Where a generic mana dork rewards spreading across a broad curve, this one earns its keep only in a build dense enough with artifacts and activated costs that its restricted output never sits idle. Treat it as flexible acceleration and half the mana evaporates; treat it as a stationary artifact-and-ability battery and it turns a defensive stall into a repeatable source of tempo. It punishes the improviser and rewards the deckbuilder who leaned all the way into robots.