一望の反射鏡 (Panoptic Projektor) (ja)
Artifact
(CMC 4)
: The next face-down creature spell you cast this turn costs less to cast.
If turning a face-down permanent face up causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.
- [MKC] Murders at Karlov Manor Commander #44 (R)