Play Claw Fossil as if it were a   Colorless Basic Pokémon. (Claw Fossil counts as a Trainer card as well, but if Claw  Fossil is Knocked Out, this counts as a Knocked Out Pokémon.) Claw Fossil can’t be affected by any  Special Conditions and can’t retreat. At any time during your turn before your attack, you may  discard Claw Fossil from play. (This doesn’t count as a Knocked Out Pokémon.)

Jagged Stone:

If Claw Fossil is your Active Pokémon and is damaged by an opponent’s attack (even if Claw Fossil is Knocked Out), put 1 damage counter on the Attacking Pokémon.