First Player
From Archon Arcana - The KeyForge Wiki
During game setup, one player is randomly determined to be the first player. That player takes the first turn of the game and must adhere to the first turn rule.
First Turn Rule: During the first player’s first turn of the game, that player may only play or discard one card from their hand. Card effects can modify this rule.
—KeyForge Master Rulebook v18.1, June 2025