Dragon decks can definitely be built without it, but red is the most iconic color for Dragons decks and has some of the best tools
When you have a deck with multiple shrines, being able to activate this for a lot cheaper and multiple times in a turn really dominates the board, and Tranquil Light can act in a similar way in Commander to help keep opposing threats from attacking you
"There's a lot of really cool artwork in the Legends set," he said
If you want to prevent regeneration, it costs 7 mana, actually
Epic cards will feature open-air borderless art, rainbow foiling, and a similar spot-gloss treatment to what is already seen on legendary cards
It also happens to make searching for specific effects much easier