---
type: User Story
title: "US-002: Unlock Creeper Aura ranks"
description: Protect blocks and modify creeper damage according to a player's earned aura rank.
status: backlog
---

# US-002: Unlock Creeper Aura ranks

As a **player**, I want Creeper Aura to become stronger as I defeat creepers so that I progressively master their explosions.

## Default progression

| State | Required lifetime kills | Damage to protected player | Creeper block damage |
| --- | ---: | ---: | --- |
| Locked | 0–99 | 1× | Normal |
| Creeper Aura I | 100 | 3× | Prevented |
| Creeper Aura II | 200 | 2× | Prevented |
| Creeper Aura III | 300 | 1.5× | Prevented |
| Creeper Aura IV | 400 | 1× | Prevented |
| Creeper Aura V | 500 | 0.5× | Prevented |
| Creeper Aura VI | 600 | 0× | Prevented |

## Acceptance criteria

- [ ] A player unlocks ranks according to the configured cumulative kill thresholds.
- [ ] A player below rank I receives normal creeper explosion behavior.
- [ ] An aura activates when an unlocked player would have been hit by the creeper explosion, even when armor or another modifier would reduce the eventual damage to zero.
- [ ] An activated aura prevents that creeper explosion from breaking or removing blocks for everyone affected by the explosion.
- [ ] Other nearby players and entities continue to receive their normal creeper explosion effects unless they have their own aura damage modifier.
- [ ] The protected player's rank multiplier is applied to vanilla creeper explosion damage before armor, enchantments, resistance, and difficulty mitigation.
- [ ] At rank VI, the protected player's creeper explosion damage event is cancelled so that damage and knockback are nullified.
- [ ] Charged creepers obey the same aura rules while retaining their vanilla base explosion strength.
- [ ] Explosions from TNT, beds, respawn anchors, and non-creeper entities are unchanged.
- [ ] Simultaneous exposure of players with different aura ranks is deterministic and tested.

## Related

- [Track creeper defeats](us-001-track-creeper-defeats.md)
- [Configure aura progression](us-006-configure-aura-progression.md)
- [User-story catalog](index.md)