(This deck is not limited to this pre-constructed deck-specific)
Magic Offline
So long as The Ur-Dragon is in either one of these zones, your other Dragon spells cost one less generic mana to cast
Illustrated by: Miguel Mercado & Scott Okumura Tezzeret the Seeker Historic Brawl decks Not Legal Traditional Standard Not Legal Traditional Alchemy Not Legal Traditional Explorer Not Legal Traditional Historic Not Legal Traditional Timeless Rulings 2009-10-01 A noncreature permanent that turns into a creature is subject to the summoning sickness rule: It can only attack, and its abilities can only be activated, if its controller has continuously controlled that permanent since the beginning of their most recent turn
Then the Verdant Mastery costs six base and ramps two basics and then grabs two for our hand too
Thankfully, over the past decade, even Wizards has realized that partners are pretty broken, and now they avoid printing more cards with the mechanic, instead relying on various partner-with-style mechanics that do something similar but with a much smaller pool of cards to choose from, like how you can partner a Doctor's companion with a Doctor from the Doctor Who set