History of Anti-Surge Challenge Modifiers

'''Anti-Surge Challenge Modifiers''' is a Guardian Ranks triumph for completing any activity with an Anti-Surge challenge modifier active. The in-game text says these modifiers are set in the Challenge Modifiers section of activity customization on Ultimate difficulty, in the Portal.

== How to complete ==

Open the Portal and pick an activity that supports customization.

Choose Ultimate base difficulty, then press Customize.

In Challenge Modifiers, enable an Anti-Surge modifier. They are tied to a damage type (a Bungie forum reply noted Strand and Void options on one Ultimate activity), so what is offered varies by activity and week.

Launch and finish the activity. Dying is fine; it only needs to be completed.

== Tips ==

• Anti-Surge options are not available in Call to Arms (Crucible) activities; the Portal's customization is for PvE only.
• Pick the Anti-Surge for the damage type your build does not use, and add easy Surge-free boons to offset it.
• Pairing it with an easy Ultimate activity such as a short Lost Sector-style or Ops encounter is fastest. Sources do not state exact reward details, so check in-game.

== Notes ==

The sources I opened describe the Portal modifier system in general terms; exact numbers and which activities offer the modifier may change between seasons.