added isSkill condition authored by Lxlp's avatar Lxlp
## Description
Checks how many mobs are in a given radius
## Attributes
| Attribute | Aliases | Description | Default |
|-----------|-----------|----------------------------------------------------------------------|---------|
| types | type, t | The types of mobs to check for | |
| amount | a | The range of mobs to check for. The caster is not counted | 1 |
| radius | r | The radius to check | 5 |
## Examples
### Single type
```yaml
Conditions:
- mobsInRadius{types=NewZombie;amount=5to10;radius=15}
```
### Multiple types
```yaml
Conditions:
- mobsInRadius{types=NewZombie,NewSkeleton,NewSpider;amount=5to10;radius=15}
```
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