Effect
[On Play] Reveal the top 4 cards of your deck. Add 1 card with [Gammamon] in its text among them to your hand. Place the rest at the bottom of your deck.
[All Turns] When your Digimon with [Gammamon] in its text other than [Bokomon] would leave the battle area other than by one of your effects, you may delete this Digimon to prevent it from leaving play.