The Mox Sapphire, Jet, Ruby, Pearl, and Emerald are each zero cost mana rocks, that provide one coloured mana per turn, for free
You can't let that live
And if its a pack you unlocked through a random pull, you might not even know which archetypes it represents
The last time we had a summer core set was way back in July of 2015, when Magic Origins unleashed Jace, Vryns Prodigy onto an unsuspecting world
17%inclusion 15%synergy 5 decks 29 decks Evolving Wilds 15%inclusion 11%synergy 5 decks 33 decks Terramorphic Expanse 12%inclusion 9%synergy 4 decks 33 decks Malakir Rebirth 12%inclusion -11%synergy 4 decks 33 decks Fabled Passage 9.1%inclusion 7%synergy 3 decks 33 decks Vibrant Cityscape 9.1%inclusion 8%synergy 3 decks 33 decks Command Tower 6.1%inclusion 0%synergy 2 decks 33 decks Urza's Cave 6.1%inclusion -2%synergy 2 decks 33 decks Snow-Covered Swamp 6.1%inclusion -0%synergy 2 decks 33 decks Marsh Flats 6.1%inclusion 2%synergy 2 decks 33 decks
I didn't want to find myself constantly explaining what my Hallar was supposed to be