I was doing well and not taking any damage as well as dealing around 40 every turn up until magma 1/3, when I was immediately destroyed by poison getting me down to ten hp as well as getting rid of over half of my items. then I was killed on turn 3 by poison. is there anything that can deflect curses and/or poison?
Emerald Bracelet is my go to for dealing with curses (along with enough space to place an adjacent 2x2 curse when you get hit with the big one)
Cleansing Potion can clear poison. I usually either burst poison enemies down or counter the poison with regeneration (but this will fail if you have more poison stacked than your max health, so I keep a cleanse or two on had to reset if I get too close)