Mono-Green Landfall wants to flood the board with Icetill Explorer, Mightform Harmonizer, and landfall triggers off Fabled Passage, so Get Lost is clean removal for their key engine creatures. Leatherhead is a large, hexproof-protected trampler that survives their green removal-light plan and threatens to destroy Earthbender Ascension or other enchantments with its combat trigger. Michelangelo's Technique whiffs on synergy since their creatures are big already, and Formidable Speaker is replaceable filler here. Keep Llanowar Elves and Great Divide Guide since matching their ramp speed is important in this race.