Justimon: Accel Arm - Dimensional Phase (BT11)

Digivolve: 1 if name contains [Justimon]
[When Digivolving] By returning 1 level 6 Digimon card without [Justimon: Accel Arm] in its name from this Digimon's digivolution cards to its owner's hand, this Digimon gains [Security Attack +1] and [Piercing] for the turn.
[When Attacking] If you have a Tamer in play, this Digimon can digivolve into a Digimon card with [Justimon] in its name other than [Justimon: Accel Arm] in your hand for a digivolution cost of 2, ignoring its digivolution requirements.