In the Necropolis expansion, using a Vaal Orb on a Map can no longer cause it to become unidentified. There’s now a new set of Corrupted Implicits for Maps!
PoE Map Corruption Outcomes
No effect (other than adding the corrupted property).
Reroll the item with random affixes. Rare maps will have 4-6 affixes.
When a map is rerolled this way, it has about a 50% chance to have its map tier increased by one and consequently its map base changed to a suitable map.
Tier 16 maps have an approximate 1/16 chance to convert into a rare tier 16 Vaal Temple Map.
When a Shaped or Elder Map gains a tier, it will become a Shaped or Elder (respectively) Map base of one tier higher, even if that map isn’t unlocked on the player’s Atlas. This system only exists on Standard, as it is no longer part of the current atlas system.
Reroll the map into a rare item with exactly eight random affixes, retaining the map base.
In addition to these effects, all bosses of corrupted maps have a chance to drop Sacrifice Vaal Fragments or Vaal Skill Gems.
Lets talk about corrupting maps. When you use a Vaal Orb on a map, the map no longer has a chance to become unidentified. Instead, weve created a set of implicits that affect the area in strange and potentially profitable ways.
Some are simple, like increasing item quantity or monster pack size. Others might increase the effect of your Atlas tree on the area. You could even roll a mod that removes soul gain prevention from the player, allowing you to absolutely spam vaal skills in the map.
If you are lucky, you could even roll a mod that makes all map device crafts free for that map.
You’ll have to discover the rest for yourself.
Example of PoE Map Corrupted Implicits
+10% Item quantity
+10% Pack Size
Atlas passive have 10% increased effect of area
Players’ vaal skills do not apply soul gain prevention