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
With her Pumpkin Carriage special summoned to the field, she is able to systematically take her opponent's life points down while immobilizing their monsters at the same time
Swat lets you change all of the targets of a spell not just one making it the best way to interact on the stack outside of conditional answers like Pyroblast
Collect evidence, however, only works by exiling cards from your graveyard
Every time it enters or attacks, you get to return a permanent with mana value 3 or less directly to the battlefield, which can mean ramping with lands, recovering utility creatures, or grabbing key combo pieces