Silumgar's Scorn
A counterspell with an attendance check. The fork in the second sentence is the whole design: pay nothing extra and the spell resolves as a Force Spike that taxes a single mana, a soft counter that folds the moment your opponent has a spare land untapped; show or already command a Dragon and the same two blue mana hardens into Counterspell, the unconditional answer no amount of mana can wriggle past. That conditional upgrade is the engine that ties the card to a tribe, and it pays in two directions: the additional cost is a reveal, not a discard, so the Dragon stays in hand to cast later, and a Dragon already on the battlefield satisfies the condition without spending anything from hand at all. The result is a card that wants to live in a deck heavy enough on Dragons that the worse mode rarely comes up: a weak tax when you whiff, a premium hard counter when you hit. The lineage is the tribal payoff grafted onto an old soft-counter template, asking you to commit to the Dragon plan in exchange for graduating from a single-mana speed bump to a true wall. It belongs to the small family of conditional Counterspells that trade reliability for a deckbuilding restriction, and the restriction here is unusually cheap to pay when the deck is built right.
