This allows you not just to play them again, but with his ability Animate Broom, you will also pay one less to do so
Speaking of, the spell creates up to three pest tokens, and so sets you up to prepare this card again to make more and at a decent cost to boot
It can deal with so much when you Bargain, and theres plenty of fodder around A 3 mana with Menace is passable, and you can augment one of your creatures with this on an earlier turn or the same turn, if you have happen to have four mana
It involves copying your creatures and using energy counters to let them stick around (or, in some cases, letting them die to take advantage of death triggers)
It presents a threat that must be dealt with if the artifact player wants to advance their gameplan at all, making this a fantastic sideboard card and a generally good stax piece
Too many lands and you will literally only have 24 playables and as such no real construction choices