Architect of the Untamed is a rare Creature — Elf Artificer Druid card from Kaladesh (KLD), collector number 143. Current market price: $0.12 (foil $0.37), TCGplayer market prices via Scryfall.
Landfall — Whenever a land you control enters, you get {E} (an energy counter). Pay eight {E}: Create a 6/6 colorless Beast artifact creature token.