The question if it was ever intended to be included in packs is not completely clear, but the discovery of E4 member styluspt that the cards was actually advertised to be in the set in a Japanese Trainers Magazine as well as on early concept designs of Jungle booster packs certainly makes this appear likely (see PIKACHU 1ST ED JUNGLE BLACK STAR PROMO - WAS IT INTENTIONAL
There are plenty of counters decks that will make good use of this
If there are more common Summons to come, the format could be in for a serious shake-up come June
1 Kodama's Reach and Cultivate Sure, some decks may be designed around something else, such as Far Wanderings or Sakura-Tribe Elder abuse, but the vast majority of decks with green in them want Cultivate or Reach
Alternatively, if you're at two life after removing the second lore counter, you may choose to attack to try and force a trade, knowing you're dead to the creatures third chapter next turn