This is balanced, since it would be completely unfair to use multiple copies of this card or any other Supporter in the same turn
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You could blind-flip or cast Nissa for a large enough amount of mana that just about anythings a hit, but youre supposed to scry and leave a card on top to 0 into the following turn
Later in the game you can also use it to reanimate a walker
More importantly, you can sacrifice the land to bring back a Bat, Lizard, Rat, or Squirrel card from your graveyard to your hand, which is a solid utility land in Standard and Commander
As a casual Pokemon TCG fan who has only dabbled in the actual card game, I cant speak to the metagame implications of the new Pokemon and Trainer cards