Fast-Pace Medusamon

This deck is made for fast-paced security breaks, Medusamon with Palidramon (BT20) in Digivolution source + affected by Flame Memory Boost gives Medusamon with 4SC, then if a Petrification Token is deleted; that's 5 Security cards gone in 1 turn if there wasn't anything in security that deleted Medusamon via DP, but Augmon and Cyclonemon would cover 4k+ DP. Bond of Bravery Ace is for backup if you can't get a 4 Check Medusamon, when attacking you need to have a Tamer Card to trash top security card, have the Owen memory gainer as if you're in a situation where you just need 1 more attack to win game; you can play out any Reptile or Dragonkin trait Digimon with , end of turn; suspend the memory gainer Owen card to make the Rusher attack.

The Guilmon needs to have 20 total cards in both player's trash to gain and the BT21 WarGreymon's Play Cost can be reduced by 2 x number of Digimon your opponent has in battle area, so swarming decks can make playing this Digimon for a low Play Cost or free. The Paildramon in the deck can allow for a end of turn attack on the same turn it evolved from a Lv: 4 with its effect to also gain and 4k DP, so its a 12k attacker with piercing on its own.

Let’s not forget about Elizamon and Dimetromon's Inheritance to gain 1 memory each when your opponent’s security is lost and the Gigimon to evolve after opponent’s security is lost.  

Bravery ACE can come in handy with getting rid of an opposing Digimon based on DP upon evolving and can evolve directly from a Agumon when things get dire. The promo Agumon can be used in a sitution where you need to break one more sercuity before going for a end of turn attack, the on play effect can delete the token.

This is what I can think of for a fast-paced Medusamon deck.