Assuming you've built any sort of deck around him, there's no way you draw fewer than three cards off of him when he comes into play, and that's a pretty good deal for six mana
The most obvious of these factors is the synergy of haste with Saproling Burst, which was known to some as "The Fix." That extra turn almost doubled the strength of the Burst and made it hit for the full 20 damage in only two turns, which would normally mean a kill on turn five, or turn four if backed up by a Blastoderm
6 Thoughtseize Stepping out of the sideboard, Thoughtseize is the first discard spell on the list to see mainboard play
This process will be used for all future Universes Beyond sets, like the upcoming Spider-Man and Avatar: The Last Airbender sets, which will be similarly balanced and legal for Standard and other formats
More worrying still is that these boosters do see some incredible pulls for the most part, but like any random booster pack, nothing is for sure
However, I think players will soon find this card is not nearly as good as anticipated, and prices for it will drop
