Trade Secrets
From Archon Arcana - The KeyForge Wiki
Trade Secrets • Ekwidon • Action • Uncommon • Play: Discard any number of Ekwidon cards from your hand. Steal 1for each card discarded this way. • Artist: Caravan Studio • Card Number: WoE:087
Play: Discard any number of Ekwidon cards from your hand. Steal 1
for each card discarded this way.

Their family's cruble recipe was almost too precious to trade.
WoE 087
Artist: Caravan Studio
Commentary
When resolving the ability of Trade Secrets, "any number" can be treated as zero.
Source: "Any Number"