Claw Fossil (SS 90). If an opening hand contains only fossils, the rule is that the player may choose whether or not to mulligan. The bug here is that having a fossil in the opening hand does not allow you to mulligan if you have no basics
Game starting
Game type: QUICKPLAY
Game format: Worlds (2004)
Player A: Wizard of Corsica
Player B: 6you7me
Coin flip result: HEADS
Player A will start.
Game setup complete
Between turns
Turn 1 begins
Attached a Grass Energy to Seedot.
Between turns
Turn 2 begins
Player B drew 1 card