Unassuming Sage
A 2/2 for two that offers a choice on the way in: leave it as a warm body, or feed it two more mana to bolt on a Sorcerer Role and turn every attack into a scry. The tension is honest about where it sits. The body and the upgrade compete for the same early mana, so committing to the Role means paying to filter your draws when you would rather be developing your board. And the payoff is slow by design: scry-on-attack accrues in small increments, which pushes the whole package toward games long enough for those single looks to matter. The load-bearing wrinkle is delivery. The filtering does not live on the creature; it lives on the Role token, which is an Aura attached to it. That gives an opponent two lines against the engine, killing the Sage or peeling the Aura with enchantment removal, and it means a second Role overwrites the first, since a creature holds only one at a time. The result is filtering more fragile than a hardwired keyword would ever be, which is the price the mechanic charges for splitting a creature's payoff into an optional second payment. Filler in a fast draw, a modest selection engine in a grindy one, with the player deciding which the moment it resolves.
