Condition - Checking for unit?

Hello all!
I am creating an RPG in which you need to get an item to a location, and activate a system via chat message in order to gain an ability.
I have the drop item, move item trigger working but with this:

Events
Player - Player 1 (Red) types a chat message containing -activate as An exact match
-
Conditions
(Random item in Location <gen>) Equal to Dummy Item <gen>
-
Actions
Unit - Add Ability to (Triggering unit)


1] This works, but I don't want the player to activate it with their unit outside the location.
2] Is there another condition besides 'check for random item' for me to use?

Try counting number of items of type and checking against that. And why not just check for unit in region?

Unit - Add Ability to (Triggering unit)

That won't work, as there is no triggering unit.

Condition is:

Boolean - Unit is in REGION is equal to true.