Normally, a player's turn begins with the untap step, then the upkeep, then the draw step before proceeding to the first main phase
These include 6-9 Commons, 3-5 Uncommons, and 1-4 Rares or Mythic Rares
There's almost no downside, and putting a card like Ulamog, the Ceaseless Hunger or Karn Liberated underneath Ugin's Labyrinth via imprint only to pick it back up when casting it is easier adds a layer of versatility to the Tron strategy that will make it even more of a threat than it has been previously
These are the engines, staples, and format-defining pieces that represent the backbone of elite collections, with high-grade copies consistently commanding prices in the $5,000 to $12,000 range
Even if you don't have enough creatures to make this a counterspell, you can always pay more into the X part of the casting cost to make it one