Scythecat Cub

Two land drops in a single turn is the whole equation this Cat is built to solve. The landfall trigger counts its own resolutions: the first land grows a target by one, but the second resolution doubles every +1/+1 counter already sitting on that creature instead of stacking another single. That is a linear payoff bent into an exponential one, and it only bends when you can manufacture a second land in the same turn: a fetchland cracked after a natural drop, a ramp spell that puts a land onto the battlefield, an extra-land-drop enabler from green's deep bench. Because the growth lands on any creature you control rather than this body specifically, the doubling can be aimed at whatever is already the biggest threat, and any evasion or protection sitting on that creature comes along for the ride. The Cub's own trample is a separate matter: it keeps a fattened Scythecat Cub from stalling against a lone blocker, but the doubling target does not inherit it. The sequencing skill is the point: keep the trigger online, then dump two lands in one turn to convert a modest pile of counters into a lethal one. This is landfall designed to scale with how densely you can pack land drops together rather than with raw land count, which puts the ceiling wherever a second trigger can be conjured on demand.