Thundersteel Colossus

Seven generic mana buys a 7/7 with trample and haste, no color required and a crew cost of 2 that any two bodies already on the table clear without thought. That is the whole pitch, and it is a deliberately modest one. Vehicles usually justify their crew tax by pricing the body below what an equivalent creature would cost, but here the frame is a fair-sized threat that happens to sit as a noncreature artifact on any turn you decline to crew it. That reversion is a real dodge against sorcery-speed removal aimed at creatures: on the turns it is not attacking it simply is not a creature, though it remains a permanent that artifact removal and generic answers can still hit. The haste lets it attack the moment it resolves; the trample means a chump-block buys the defender one card, not a full turn. What it offers over a comparably sized creature is that on-and-off creature status and the colorless cost that slots it into any deck with spare attackers. What it asks in return is that you have those attackers, which caps its ceiling: the card is a payoff for a board that already exists, not a way to build one from nothing. A closer for go-wide strategies that have run out of things to do with their leftover bodies, and little more than that.