When 1 or more damage counters is put on one of your Triumvirate Sith, attach Lord of Pain to that Triumvirate Sith.
Equipped Triumvirate Sith gets Resilience X, where X is the number of damage counters on this unit.
Keywords
Equip
Equip: A selective effect on Equipment activated during the build step that means, "Attach this Equipment to a unit. Play only during your build step." You can pay the Equip cost only once per turn.
Resilience
Resilience X: A cumulative, static ability that means, "As long as this unit has at least X damage counters on it, it gets +X power."