Checkpoint: The Shark Zone

[CNT] Choose 1 of the following: -Put this into your field zone. -Flip up to 2 face down cards in your damage zone face up.

"Shark Infested": When an allied {Racer} unit in an attack zone is destroyed by your opponent, you may add it underneath this as a charge.

"Narrow Escape" - Turn 1: When an allied {Racer} unit in an attack zone is destroyed by your opponent, you may [Put 1 charge under this into the graveyard.] to special summon 1 {Racer} unit from among this card's charges.

Allied {Shark} units gain +1 ATK and have Breakthrough.

Charges under this cannot be moved to anywhere else except through abilities and effects of "Checkpoint" or {Racer} cards.