Inferno Titan

Of the five-color Titan cycle, this is the one that ends the game by itself, with no setup and no second creature required. The enters-and-attacks burn does triple duty: it clears a blocker before combat, picks off a planeswalker, or just throws three to the face on the swing back, and because the damage divides freely, it can split across multiple small threats or focus a single target. What pushes it from value engine to clock is the firebreathing. The 6/6 body is already a fast clock, but the repeatable +1/+0 means every untapped Mountain can grow it past blockers or into lethal range, turning a topdecked land into reach. The two halves reinforce each other in a way the other Titans do not: the attack trigger softens up the defense, and the pump pushes whatever survives through. Most six-drop finishers ask you to protect them for a turn before they pay off; this one demands an answer the moment it resolves, because leaving it alive means eating three damage now and three more on the next attack, with no breathing room between trigger and payoff. It is the rare fatty whose ceiling scales with the resources you were going to draw anyway: lands you would have played regardless become firebreathing fuel and extra range, so the threat compounds without ever asking you to commit more cards to the table.