Justimon: Critical Arm - Xros Encounter (BT10)

[When Digivolving] By returning 1 card with [Justimon] in its name other than [Justimon: Critical Arm] from this Digimon's digivolution cards to its owner's hand, delete 1 of your opponent's Digimon with a play cost of 9 or less.
[When Attacking] If you have a Tamer in play, this Digimon may digivolve into a Digimon card with Justimon in its name other than [Justimon: Critical Arm] for a cost of 2, ignoring its digivolution requirements.