digimon card game machinedramon New Mlikemat Playmat DTCG Mat TCG CCG OCG Trading Mat with Zones + Free Bag (ZD002-852-SM) : Toys & Games Machine/DM/Ver.5 Machinedramon (EX9-073) | DigimonCardGame Wiki

Shadow Puppeteers's last ability overwrites any previous effects that set the creature's power and/or toughness to specific values

Sleeves will help to increase their service life significantly

Magmar variants proved to be the strictly better midrange decks

And that's just the start

Open mana and a card in hand could mean a counterspell, removal, or a combat trick waiting to punish a bad decision

With more than one copy of a card in your possession, you can easily trade it to someone who doesnt have it, or if you are a competitive player, you may need multiple copies of one card to be able to find it in your 60 card deck (which will happen a lot!)