My pick: Merlin - Crab Prince John - Greediest of All is another card that is better suited for Constructed because a typical Limited pool contains only a single discard effect
Take for example, the fastlands from Kaladesh
This can help with Flashback, Retrace, Reanimator strategies, sure, but personally, Im not feeling it
This creature is really inefficient
Ive played against it a couple of times in Brawl on MTG Arena, and if you cant deal with Narset before it attacks, it's pretty much game over due to its ability that lets it target non-creature spells from any graveyard, exile them, and cast a copy for free
While I would say that any color can be the backbone of your draft deck depending on what cards you find in pack one, this uneven dependency on certain color-specific mechanics means some base colors feel more constrained in where they can go through packs two and three