Safe or Sorry
From Archon Arcana - The KeyForge Wiki
Safe or Sorry • Shadows • Action • Uncommon • Play: Choose one:• Archive any number of friendly creatures from play.
• Choose a creature. Deal 1 to it for each your opponent has. • Artist: Bogdan Tauciuc • Card Number: DT:222
Commentary
If an ability says "Choose a creature," the Active Player may choose a Friendly or Enemy creature when resolving the effect.
Source: Rulebook
When resolving the ability of Safe or Sorry, "any number" can be treated as zero.
Source: "Any Number"