Some elites have passive abilities. These abilities trigger just from an elite being in a region (usually worded as “a region that as a X.”) For these abilities, they happen once per region regardless of how many of that elite is in the region.
List of passive abilities that are once per region:
Aldan - Volley: If Aldan has an Elagynt and a Wynden in play, activate [assault]. (This is actually once regardless of how many are in play in total).
Guild - Stellen: When The Guild attacks a region that has a Stellen, it also steals [1 Corra].
Guild - Crysen: When The Guild attacks a region that has a Crysen, it deals damage equal to # of Crysen in play.
Ooglan - Nameless: When Ooglan attacks a region that has a Nameless, deal damage equal to # Vitality of that Nameless. You may then discard a Horde in this region to heal a Nameless there by 1.
Runen - Miner: Deploy to a region you occupy. In Phase 2, gain [1 Corra] for each region your side controls that has a Miner.
Venna - Hag: If Venna is damaged by an attack in a region that has a Hag, deal 1 damage to the attacker in that region.
Venna - Acolyte: If Venna is damaged by an attack in a region that has an Acolyte, deploy 1 Tyro (to your DZ).
Venna - Cauldron: Deploy to a region you occupy. Cannot move or be moved. If attacked, Cauldrons take damage last. At the start of each round, add 1 Tyro from the discard to regions with a Cauldron.
Koda - Grizzled: Before a Grizzled moves into a region, attack that region for 1 damage. When Koda attacks a region that has a Grizzled, deal +1 damage. (The second part is passive)
For active abilities, these happen per elite. Examples of active abilities that are once per elite:
Aldan - Elagynt: When deploying an Elagynt, you may also deploy a Lythe.
Runen - Ram: After moving a Ram, move up to 2 troops from this region to a single adjacent one. You may spend [1 Corra] to deal 1 damage to each of these troops.
Paldeyn - Lyon: At the start of each round, each Lyon heals 1 Vitality.
Paldeyn - Ryder: After moving, a Ryder may move again. On its second move, deal 1 damage to an opposing troop in the region it moved from.
Koda - Trapper: Deploy face down to a region you occupy. Cannot move or be moved. If attacked, Trappers take damage last. When an opposing troop moves to this region, reveal the Trapper’s action and activate it against them. (It’s written similar to the passive abilities, but it’s intended that when an opponent moves into a region with multiple Trappers, all of them are activated.)
Koda - Grizzled: Before a Grizzled moves into a region, attack that region for 1 damage. When Koda attacks a region that has a Grizzled, deal +1 damage. (The first part is active)