Minions have 10% chance to gain Onslaught for 4 seconds on Kill Minions have 10% reduced Movement Speed

What this record tells you

This is a crucible tree modifier available from level 50. Its listed spawn tags determine which item families can naturally receive it.

Positive spawn weight means the modifier is eligible for that tagged item family. A zero weight blocks it for that tag. Weight is relative—not a simple percentage by itself.