I think an initial misconception will be that you need to be a spells deck for this card to be good, but around a third of the creatures have built-in instant/sorcery spells via Adventure
Not only that, but your Alms Collector will stay in play afterwards, meaning that itll continue to get value for you unless the other player deals with it
You draw three cards and put two cards back all while Brainstorm is resolving
same proportion as above), a borderless woodblock common (2.6%), borderless woodblock or borderless character uncommon (5.7%), or rare or mythic rare (16.7%
It's essentially a one-sided black board wipe
Since you dont have to cast the creature, you can leave the card in exile if youre scared of your opponent getting it back somehow