Suzerain
From Archon Arcana - The KeyForge Wiki
Suzerain • Geistoid • Creature • Rare • After Reap: Purge the top card of a player’s deck. If you do, make a Minion. • Artist: Djib • Card Number: ToC:056
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