Piercing x The defender collects *x* less defence dice, e.g. Piercing 1. If the rule is Piercing Crits *x*, this only comes into effect if you retain any critical successes.
Seek When selecting a valid target, operatives cannot use terrain for cover. If the rule is Seek Light, operatives cannot use Light terrain for cover. Whist this can allow such operatives to be targeted (assuming they're visible), it doesn't remove their cover save (if any).