Sanguine Brushstroke's last ability triggers whenever you sacrifice a Blood token, not just when you activate a Blood token's activated ability
Unfortunately, you have to pay mana every time you want to draw a card, but if your hand is empty or close to it, this mana cost is often worth it
1st Edition cards were only released in the first print run of the Pokmon TCGs Base Set before being replaced by Shadowless and Unlimited variants, so they are extremely rare
This made it five total cards in all, one of each color
I am also partial to getting a pseudo Time Walk out of it when my opponent has nothing going on and I give them a dud draw
Gaining Hexproof is also super-relevant, as it turns off direct damage effects, discard effects, and a lot of graveyard hate all in one swoop