Triggered Ability

A triggered ability specifies a condition and then an effect. Triggered abilities use words such as 'when,' 'whenever,' and 'at [a specified moment].' For example, Scourge Zombies have a triggered ability. If the act of removing a triggered ability would satisfy its trigger condition, the ability is still triggered.

For example: If you play Fields of Phyxis in front of Vindictive Nation, Vindictive Nation will be silenced but its ability will still trigger and cause life loss.