Voidmage Apprentice

A counterspell normally telegraphs itself: untapped blue mana and a card clutched in hand are all the warning an opponent needs. This one hides as a 2/2 morph, a face-down creature that reads as a body, not a threat to the stack. The trick is the trigger window. Because the counter fires when the card is turned face up, the morph cost can be paid in response to a spell on the stack, and the counter resolves before that spell ever does. But the disguise is expensive. The full sequence runs seven mana across two stages: three to deploy face down, then to flip, and an opponent casting into four lands' worth of open mana with two blue sources up has reason to suspect something. The flip leaves behind a 1/1 Wizard that does nothing further, and the counter only ever answers one spell. It is strictly slower and pricier than holding up a real counterspell, which is the toll the morph charges for concealment. What the design demonstrates cleanly is the thing morph adds to interaction: information denial. The opponent has to sequence around a counter they cannot confirm exists, and that uncertainty taxes their play whether or not you ever pay to flip. The face-up body is irrelevant; the unanswered question of what the face-down card might be does the work long before any mana is spent.