Raging Poltergeist

Six power on a single point of toughness is a stat line that exists to make blocking miserable, not to survive it. The Poltergeist forces an unhappy arithmetic on the defender: throw any creature in front of it and you kill the thing, but you've spent a body to stop a five-mana attacker, and because there's no trample you take nothing for letting it through except the full six if you don't block at all. That is the binary it's built around, and it's a worse deal than it first sounds, because the toughness makes the threat trivially easy to erase. A one-damage effect, a deathtouch blocker, a creature that simply has a point of power and survives the exchange: any of these answers it for less than it cost. The single toughness is the price red pays for that swing, and it's steep, because so much of what touches the board cancels the card outright. As aggressive design it sits at the brittle extreme of a vein red has mined for decades: maximum attack, negligible defense, no evasion to protect the investment. The Spirit body and lack of haste mean it announces itself a turn before it can act, handing the opponent a clean window to find the answer. What it sells in return is clock math: connect once and the mana has paid for itself in tempo. The point is the threat of the swing doing more work than the swing.