New personal record! Lucky 1 dice with the grow property are really strong
You know the random event where you get to pick a dice or take the heal to full, +6 hp, take -15 damage. I usually take the second. Also, I knew what dice I wanted. Once I had my set, I'd never take the add a dice option over +3 hp reward. Oh, also, never (as much as you can anyway) end a fight with less than full hp. Keeps you from getting greater max hp.
That's an eternal block dice. They are unlockable and some of my faves. They all start really weak, so they'll only be worth it if you have good purple dice or make it into a grow dice (which I recommend). Play it once, it stays out, it grows by 1 every turn. Pair it with a terrain dice to start strong and watch it get better over time.