The transformation chance depends on the carrier's base shop cost.
| Carrier cost | Script threshold |
|---|---|
| 1 | 90% |
| 2 | 80% |
| 3 | 70% |
| 4 | 60% |
| 5 | 50% |
On success, the carrier is replaced by a random Undead piece of the same cost and star level. At most one piece can transform per round.
A 3-star Druid is treated as costing 1 less for both the roll and the resulting Undead, i.e. a 3-star 1-cost Druid is treated as 0-cost and cannot transform.