Raider of the Peaks
From Archon Arcana - The KeyForge Wiki
Raider of the Peaks • Brobnar • Creature • Uncommon • At the start of your turn, the player who controls the most powerful creature discards the top card of their deck. • Artist: Hypersteve • Card Number: GR:032
Commentary
With the exception of draw, if an ability references the top card of the deck and the deck is empty, the discard pile is not shuffled to form a new deck.
Source: Crucible Cast 4