Onyxia has +X ATK while attacking this turn, where X is the number of opposing heroes.
| Detail | Value |
|---|---|
| Card type | Ability |
| Type details | Instant Ability |
| Component | Raid Deck |
| Component card number | 11 |
| Cost | 1 |
| Artist | Mauro Cascioli |
| Flavor text | "Excellent. You all should make a fine snack." |