Rhino, Barreling Brute

Seven mana buys a 6/7 with vigilance, trample, and haste, a fine beater and nothing more until you read the trigger and reverse-engineer what it wants. The attack-time card draw fires only if you've already cast something expensive that turn, and the body itself, cast the honest way, clears that bar the moment it resolves: it is a big spell that rewards you for casting big spells, then immediately swings and starts refilling. That self-referential structure is the design idea worth sitting with. Most "spend big, get rewarded" payoffs sit in the graveyard or on a smaller enabler and ask you to build the expensive half separately; here the payoff and the enabler are the same seven-drop, so the first attack after it lands is free card advantage without any additional setup. The turns after are where it gets interesting: the haste-and-vigilance beater becomes a standing draw engine, but only on turns you cast a spell with mana value 4 or greater, which quietly pushes a deck toward a top-heavy curve rather than a flood of cheap creatures. That threshold is what keeps the trigger from being automatic. It is a reward built for decks that were already going to cast costly things and wanted a reason to keep attacking while they did.