A Hero Emerges [DT02-EN048] Common BT4-027 If another "D/D" monster(s) is

If another "D/D" monster(s) is Normal or Special Summoned to your field while this monster is on the field (except during the Damage Step): You can target 1 "D/D" monster in your GY

and can not activate them until their next turn after Setting them

also they cannot Special Summon monsters from the Graveyard

Set: Revision Pack Cards Card type: Digimon Rarity: Super Rare Digi type: Dragonkin Play Cost: 12 Form: Mega Attribute: Virus Digivolve Cost: 4 Digivolve Cost Level: 5 [When Digivolving] If this Digimon has a red digivolution card

A Hero Emerges [DT02-EN048] Common BT4-027 If another "D/D" monster(s) isSet: Duel Terminal 2 Card type: Normal Trap Rarity: Common Attack: 0 Defense: 0 Activate only when your opponent declares an attack. Your opponent selects 1 random card from your hand. If it is a Monster Card, Special Summon it on your side of the field. If not, send it to the Graveyard.