Kaito, Cunning Infiltrator has a few things going on for it, notably that you can give a creature unblockable and profit from your creatures hitting your opponents
Each of these cards captures the history of Captain America, different moments and different eras of the characters, and, of course, they honor the shield
I love the expression
The fact is that Magic: The Gathering is one of the world's most complicated games, and even the designers can't keep track of how every single card interacts with one another
If Agent's Toolkit somehow ends up with counters on it other than the ones it entered with, those may also be moved from it by its triggered ability
You can use Bedlam pre-combat to end the game, like you would with a Falter effect, and not worry about anything else