Can Vi cycle her entire discard pile (e.g., 20 cards) to give her +20 might from her ability?

Ruling: Yes, you can cycle your entire discard pile to give Vi that much might (e.g., +20 might from 20 cards in discard pile).

Nuances:

• The ability is not at Reaction speed, so you must use it before entering a showdown
• The ability can only be used on your turn