By using Myr Welder to absorb the activated abilities of White Lotus Tile after it has been exiled, our mechanical construct gains the unique ability to tap for massive amounts of colored mana based on our creature types. We can then funnel that generated mana directly into Seedcradle Witch's activation cost to untap Myr Welder while simultaneously pumping its power and toughness to astronomical heights. Because Seedcradle Witch untaps the Welder rather than itself, this feedback loop sustains an infinite cycle of mana generation and creature growth.