Megidramon (Digimon Card Game Deck Box Set) (BT5-083) - Battle of Omni

[When Digivolving] Both players trash the top 5 cards of their decks.
[On Deletion] If you have a Tamer in play, you may play 1 level 6 Digimon card with [Gallantmon] in its name from your hand or trash without paying its memory cost.