Its not even on the Reserved List, so you could expect it to get a reprint just like other cards seen in Portal Three Kingdoms
Because the set was focused on wedges and the Dragonlords were ally-colored creatures, a misfit for a wedge set (wedge sets use two-color enemy pairs as those overlap two wedges), there wasn't a good home for them
Another theme coming in from the green and white side of the color identity is +1/+1 counters, often passively generated
CORE SETS ARE PHASED OUT AGAIN Adventures in the Forgotten Realms began design as a Dungeons & Dragons -themed Core Set, but during design the team moved away from this, because they wanted the set to feel mechanically unique to better reflect the world of D&D
While Elesh Norn is still standing in a pose that is reminiscent of her original card, this iteration of her has her looking directly at you instead of off into the distance, and more importantly, she is graced by a dead body draped over her massive headpiece