The idea is, you play her and force an opposing creature to block one of your creatures, ideally, killing that creature and keeping yours alive
When you first take a look at a card with the adventure mechanic, you can immediately tell that its different
(9/24/2021) If the top card of your library changes during the process of casting a spell or activating an ability, you can't look at the new top card until the process of casting the spell or activating the ability ends (all targets are chosen, all costs are paid, and so on)
How do rarity and print runs affect a Pokemon cards value
Then youve come to the right place
Plus, since it doesnt technically counter a spell, it can be used to get around the uncounterable cards out there like Abrupt Decay