Mono Green Landfall is a fast, linear aggro deck that wins by flooding the board with landfall triggers from creatures like Mightform Harmonizer and Icetill Explorer backed by acceleration from Llanowar Elves and growing threats like Sazh's Chocobo. Pyroclasm is your most important sideboard card here, wiping out mana dorks and small landfall threats before they spiral out of control. Flashfreeze is a clean answer to their key green spells and comes in as a hard counter that can't be played around, while Get Lost answers a resolved Earthbender Ascension or other problematic permanent that survives your sweepers. Erode and Improvisation Capstone are too slow or situational against this aggressive gameplan, and one copy of No More Lies is cut since countermagic is less impactful against a deck that goes wide on the board rather than resolving one critical spell.