Listed on each enemy’s card are modifiers that add to the Enemy Die based on the type of attack the hero uses:

For all Goblins against any attack, the modifier is the number of Goblins currently in the dungeon.

For instance, if 2 Goblins are in the dungeon each one has a +2 modifier.

Minions each have different modifiers for Melee Attacks and Missile/Spell Attacks.

Bosses have a modifier for each type, as well as other special effects.