Gabumon ST21-10

Effect: [Your Turn] While your opponent has a Digimon with 10000 DP or more, or your Tamers have 3 or more total colors, this Digimon can digivolve into [MetalGarurumon] in the hand for a digivolution cost of 4, ignoring digivolution requirements.

Inherited Effect: [When Attacking] [Once Per Turn] ＜Draw 1＞ (Draw 1 card from your deck). Then, trash 1 card in your hand.