Spark Double

Clone effects had always pointed outward: you paid for flexibility by wearing an opponent's stats, taking a copy of something you did not own. This one inverts the choice. It copies a creature or planeswalker you already control, which is a different design problem entirely, because you own the best thing on the board and now you get a second one. The counter bonus is the tell that it wants to go bigger than a straight mirror: the copy always arrives one tick larger than its source, an extra +1/+1 counter on a creature or an extra loyalty counter on a walker. And because it enters without the legendary supertype, it dodges the legend rule that would otherwise send all but one same-named legend to the graveyard, turning a restriction that normally punishes duplication into an invitation to run two of your own legendary threat. Copying your own value engine, your own board-defining bomb, is the whole thesis: a clone built to multiply what is already in front of you rather than steal what is across the table. The planeswalker clause is the quieter half of the design and the more novel one; permanent-based ways to duplicate a walker and keep both copies, ultimate loyalty and all, were vanishingly rare before this kind of effect existed. Between the extra counter, the shed legend status, and the creature-or-planeswalker flexibility, it reads less like a Clone descendant than a purpose-built engine multiplier.