Lifelink is a triggered ability that most often appears on creatures, but can appear on any permanent.

系命属于触发式异能，通常出现在生物上，但也可能出现在任一种永久物上。

youdao

So, a six slot piece of armor could have 6 independent skills inside of it, or perhaps a lifelink and damage gem hooked up to a primary skill with 3 other separate skills.

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