[LV1][LV2] (Permanent) All yellow spell cards in your hand get 2 additional yellow Cost Reduction.
[LV2] (Permanent) All yellow spirit cards in your hand get 2 additional yellow Cost Reduction.
"We need to find the key before she shows up," said my companion. It is very rare to see him being nervous like this. -from the 5th paragraph in chapter Yellow of "Record of the Strange World" by Wanderer Lolo"-