digimon card set Classic Collection Amethyst Mandala ST Bandai | Digimon Card Game:

You clearly need to be heavy on equipment to use Firion, but assuming you are, it should be pretty strong

One drawback is that your opponents have more combined life than you have cards in your deck, so it's possible to deck yourself out if you hit a combo too early or without a way to throttle it

Card Name Shelob, Dread Weaver Mana Cost Type Legendary Creature Spider Demon Rarity Rare rules Text Whenever a nontoken creature an opponent controls dies, exile it., Put a creature card exiled with Shelob into its owner's graveyard: Put two +1/+1 counters on Shelob

Anyway, theyre also a five mana 4/4 with Menace, but the main thing that makes them powerful is their ability