Troll Block

The Troll Block room is a Secret Room that contains a single key wall (or sometimes 2 or 3) and one or two keys.

The room design is intended to indicate that you are supposed to use the key in the block. However this will mostly just waste the key.

How it works

Troll blocks have a $100*{\frac {key\_pillar\_count}{20}}\%$ chance of dropping loot.

key_pillar_count represents how many troll blocks you have opened on your save file. E.g. if you have opened 10 blocks, you have a 50/50 chance of getting an item. The key_pillar_count is reset to 0 if you are successful with getting an item so with that reset.

This means that every drop requires on average five keys with a maximum of 20 if you are absurdly unlucky (1 in 43 million).

key_pillar_count can be found as one of the upgradeStrings inside the Save.json file. It does not increment when you open normal locked blocks.

EightyTwo said in the Discord that it is a ramping 10% chance. However, after digging into the code to gather the loot percentages, the code indicates it is a ramping 5% chance.

Loot

Chances

Chance	Loot	Odds
32.2%	a Bag O' Bombs	${\frac {10}{31}}$
32.2%	a random potion from the potion table	${\frac {10}{31}}$
16.1%	500 gold piece	${\frac {5}{31}}$
16.1%	mini chest	${\frac {5}{31}}$
3.2%	Blueprint	${\frac {1}{31}}$

After the player has discovered all the blueprints the probabilities are adjusted

Chances

Chance	Loot	Odds
33.3%	a Bag O' Bombs	${\frac {2}{6}}$
33.3%	a random potion from the potion table	${\frac {2}{6}}$
16.7%	500 gold piece	${\frac {1}{6}}$
16.7%	mini chest	${\frac {1}{6}}$