Once you have [Diaboromon] in your battle area, use [BT17-100 Doomsday Clock] and place multiple tokens on your field
The GY effect is useful for enabling follow-up plays as well, though not usable in the same turn as the first effect
In it, Cthulhu wreaks havoc on Arkham despite the investigators best efforts, leaving the city and its inhabitants permanently changed
(Draw 2 cards from your deck.) Lower Text - Promo Info BOOSTER DIMENSIONAL PHASE [BT-11] CLOSECLOSE BT11-064 C Digimon Lv.4 Greymon (X Antibody) Color Black Red Form Champion Attribute Virus Type Dinosaur/X Antibody DP 6000 Cost 5 Digivolve Cost 1 3 from Lv.3 Digivolve Cost 2 3 from Lv.3 Upper Text Digivolve: 0 from [Greymon] [Your Turn] When this Digimon would digivolve into a card with [Greymon] in its name, reduce the cost by 1 for each of that card's colors
They're often used by those who sell their cards online to ensure they arrive safely at their destination, but they're also a great way of keeping your most prized cards flat, safe, and on display
Second thought: Oh shit