This Vintage-legal loop transforms the graveyard into a bottomless quarry by using Ramunap Excavator to let you continuously replay lands that you sacrifice to Thaumatog. While sacrificing lands to Thaumatog normally stalls your development, Fastbond bypasses land-play limits so you can immediately drop them right back onto the battlefield. Though Fastbond will deal one damage to you for each land played after the first, the trade-off is more than worth it: you get infinitely large creatures and an endless stream of landfall triggers fueled by whatever mana your lands can produce.