Whenever Gwenom attacks, until end of turn, you may look at the top card of your library any time and you may play cards from the top of your library
One caveat is when a card is too good
That has more-or-less always been the case for Baby Pokemon (excluding Togepi/Riolu/Toxel)
Fluttershy The activated ability is inexpensive, Un-set level removal, and with a little deckbuilding effort, will group hug your whole team
If you enjoy a more spellslinger-style deck, you can lean hard into cost reducers like Sunscape Familiar, Baral, Chief of Compliance, and Jace's Sanctum to cast a flurry of noncreature spells each turn
For three mana, you can tap Feldon to create a token of a Creature card in your graveyard, except its also an Artifact on top of other types