Omnimon Alter-S (Secret Rare) (World Championship 2021) #BT3-112

[When Digivolving] Trigger [De-Digivolve 1] on all of your opponent's Digimon. (Trash a card from the top of one of your opponent's Digimon. If it has no digivolution cards, or becomes a level 3 Digimon, you can't trash any more cards.) Then, delete all of your opponent's Digimon with 5000 DP or less.
[When Attacking] You may make this Digimon unblockable for the turn by returning one of its level 6 digivolution cards to your hand.