This vintage-legal engine relies on the synergy between Icetill Explorer and Fastbond to shatter land-drop limits, allowing you to continually play lands straight out of your graveyard. Trenching Steed provides the vital outlet to feed those lands back into the graveyard by sacrificing them, turning your mana sources into fuel for its ability. Every iteration of this loop triggers Icetill Explorer's landfall ability to mill cards while churning out endless triggers, though you will have to mind Fastbond's life-tax as you go.