Here are all the cards Cosmoem can evolve into as of April 2019, you can see that they are nowhere near being useless: answered Apr 30, 2019 at 12:02 2 Generally if you're putting a Pokemon that can't do damage in your deck, it's for some other advantage that you're hoping to get elsewhere
Realistically, that makes it a powerful - and fairly easy - ability to use, with the only catch being that you can't use the move again on your next turn
It is to focus on PSA 10 cards where demand already exists: Pikachu, Charizard, Eeveelutions, Mew and Mewtwo, Japanese promos, popular Trainers, limited distribution cards, and cards that stores can explain quickly to customers
Oh, did I ever mention that players have five cards in their hand at any given time
Lower Text - Promo Info booster Battle of Omega [BT-05] CLOSECLOSE BT5-075 C Digimon Lv.4 Musyamon Color Purple Form Champion Attribute Virus Type Wizard DP 4000 Cost 4 Digivolve Cost 1 2 from Lv.3 Digivolve Cost 2 - Upper Text Jamming (This Digimon can't be deleted in battles against Security Digimon.) Lower Text - Promo Info booster Battle of Omega [BT-05] CLOSECLOSE BT5-076 C Digimon Lv.4 BlackGrowlmon Color Purple Form Champion Attribute Virus Type Dark Dragon DP 4000 Cost 5 Digivolve Cost 1 2 from Lv.3 Digivolve Cost 2 - Upper Text - Lower Text [Your Turn][Once Per Turn] When one of your other Digimon is deleted, this Digimon gains Security Attack +1 (This Digimon checks 1 additional security card) for the turn