Norritt was a card in the vein of Nettling Imp, only it cost one more Mana and had the ability to Untap target blue creature. The idea of using your land to deal damage is not a new concept, but Ice Ages hecatomb took it to a new level

Madison Li Dune Drifter Elder Owyn Lyons Emergency Weld Excavation Elephant Fabrication Foundry Fortuitous Find Glissa, the Traitor Goblin Engineer Hanna, Ship's Navigator Harnessed Snubhorn Hero of the Dunes Interceptor Mechan Ironsoul Enforcer Kami of Industry Leonin Squire Loran, Disciple of History Lorehold Charm Master Skald Mine Excavation Moriok Scavenger Oltec Archaeologists Protomatter Powder Pyretic Rebirth Ratchet, Field Medic Razor Hippogriff Recommission Reconstruction Refurbish Remember the Fallen Repair and Recharge Restoration Gearsmith Ritual of Restoration Rootwater Diver Salvage Scout Sanctum Gargoyle Scarecrone Scour for Scrap Scrap Welder Sharuum the Hegemon Shuri's Fabricator Skeleton Shard Tameshi, Reality Architect Tezzeret, Master of the Bridge Trading Post Trash for Treasure Treasure Hunter Treasury Thrull Trusty Packbeast Trusty Retriever Tune Up Vulpine Harvester White Widow, Free Agent
A reprint alone is nice, but a John Avon reprint
In the world of green midrange or ramp decks, landing a Harmonize often means sustaining the pressure and avoiding running out of gas
If you do, it gains haste, and its returned from the battlefield to its owners hand at the beginning of the next end step.) Backup 1 (When this creature enters, put a +1/+1 counter on target creature