There are like three other cards that do the same thing as Glimpse of Nature but cost an extra mana of a different color or force you to jump through some hoops to really get there
Essentially all the addictive gameplay elements, filling up an entire index/compendium, befriending a diverse cast of creatures, and becoming the world's best tamer/trainer, are all locked inside the Nintendo vault
While Edgar Markov's other ability definitely makes attacking with it successfully valuable, just casting Vampire spells in general will amass a favorable board state
They try to make sure the card text is as unambiguous as possible
Lets build the best artifact commander deck
With Pandemonium on the field, Mazera forces the opponent to discard three cards randomly, which can be completely back breaking if it happens early enough