Keen-Eared Sentry Keen-Eared Sentry is another situational you have hexproof card, but its one of the most valuable when its trinket text matters
If it's the first combat phase of your turn, there is an additional combat phase after this phase
Then, as this card was clearly encouraging you to play Rats, they gave the creature a static ability that helped Rats, granting them menace
Convoke is also a helpful keyword, allowing you to turn all of your creatures into mana dorks to help pay for this
Well that sucks, since you now know that the chance of drawing the Lightning Bolt is 0 out of 49, or simply 0
I also haven't done this for any other deck, but if you're willing to dish out a few extra bucks I highly recommend picking up Calamity of the Titans, Desecrate Reality, and Not of This World, they're all under $5 each but they are incredible for the deck