Cull the Weak
From Archon Arcana - The KeyForge Wiki
Cull the Weak • Dis • Action • Common • Play: Destroy the least powerful enemy creature. • Artist: Radial Studio • Card Number: AoA:057
If there are multiple creatures that qualify as the least powerful, each is considered “least powerful”. If an ability requires the selection of a single least powerful creature, and multiple creatures are tied, the Active player chooses among the tied creatures.
Source: Least Powerful