For Candlelit Sanctum, can you choose to recycle zero cards after looking at the top two cards of your deck, or must you recycle at least one?

Ruling: You can choose to recycle zero cards. The "may" in "you may recycle one or both of them" means recycling is optional, so you can look at the cards and choose not to recycle any.

Sequence:

• Look at the top two cards of your deck
• Choose whether to recycle zero, one, or both cards
• Put any non-recycled cards back on top in any order

Nuances:

• The phrasing "one or both" does not exclude the option of recycling neither card; the "may" makes the entire recycling action optional