You can find the decklists for each of these half-decks below
For instance, what about: Creatures (4) Planeswalkers (2) Lands (25) Spells (29) Everybodys so caught up on Teferi, Time Raveler that we might do well to sidestep that entire topic
Cross-Platform Works seamlessly on desktop, tablet, and mobile devices
A 1/4 for four mana, Urza notably allows each artifact under its owner's control to be tapped to produce one blue mana, providing absurd amounts of blue mana ramp as long as its controller has access to artifacts
Moldering Gym / Weight Room Give some space for a good room, Moldering Gym certainly sees more use since it fixes mana with a Rampant Growth effect
Understanding what these five phases are and how they work is an essential part of understanding gameplay