Yes, they will stay out in half the drafts, but if they take up 2 slots per color and 5 artifact ones, 15 cards in a 540 cube average 0.42 tribal cards per booster
There is (at least in theory) supposed to be a drawback to playing multiple colors by limiting the consistency of your access to the different types of mana, which you have to address by filling more of your deck with fixing
1 Ezuri, Renegade Leader
A 60-card deck with nothing but 1-drops and 2-drops, maybe even a 3-drop or two, doesnt need to maintain the 24-land default
Who its for : First-time HCP buyers, Mega Evolution nostalgic collectors, and anyone wanting the newest HCP experience at the most accessible price
You have the usual suspects to start in Llanowar Elves, Elvish Mystic, and Arbor Elf