For newcomers, theres no better time to pick up a starter bundle or a preconstructed Commander deck
At $2 each, its worth taking a flier on a set
It matters less if you already run Training Grounds for other reasons, and decks like Brudiclad just want the permanent to turn into a clone of something else anyway
Estrid should be able to protect at least one other permanent each turn, while untapping lands enchanted with Fertile Ground or enchanted creatures that have attacked to reclaim some blockers
Heavily Played condition cards may include cards that have significant creasing, folding, severe water damage, heavy whitening, heavy border wear, and /or tearing
Three planes in one set was already stretching things a bit thin, so the addition of all the racing teams muddied things even more