If I play Brilliant Blender but don't want to discard any of the cards in my deck, can I choose to discard no cards?
No, you must discard at least one card from your deck if you play Brilliant Blender.
Source: Surging Sparks FAQ; TPCi Rules Team (2024-11-07)

Relevant cards

Note: All applicable cards may not be listed below.
SV8_164
SV8_164