Trench Gorger

The body is a variable, and the input is your entire land count. The enters trigger searches up any number of lands, exiles them, and resizes the Leviathan to the pile: in a deck stuffed with basics, that is a one-card finisher sized to dwarf anything else on the table. The trick is that "exile" reads like a tax but functions as a benefit. Stripping the remaining lands from your library means every subsequent draw is a spell, which late in a game where eight mana is already on the table is exactly what you want; the bigger the body grows, the thinner your deck gets, and the thinner deck is the upside, not the penalty. What it actually asks for is a manabase built wide rather than deep: more land cards in the deck means a larger swing and a cleaner draw step on the back end, the opposite of the usual ramp tension where every land past the curve feels wasted. Trample is the one line that reads like a closer and the one ability that costs nothing, the reason the resized body matters at all rather than chump-blocking its way to irrelevance. As math it is clean: the floor is the printed 6/6, the ceiling is whatever your library is holding, and the exile clause that looks like a cost is doing double duty as a deck-thinning engine.