LordKnightmon

When this card would be played, if you have 4 or more cards with [Knightmon] or [Lucemon] in its text in your trash, reduce the play cost by 5.
[On Play] [When Digivolving] Until your opponent's turn ends, their Digimon's effects don't affect 1 of your Digimon.
[All Turns] [Once Per Turn] When any of your Digimon with [Knightmon] or [Lucemon] in its text are played, ＜De-Digivolve 2＞ 1 of your opponent's Digimon. (Trash up to 2 cards from the top. You can't trash past level 3 cards.)

[Security] ＜De-Digivolve 1＞ 1 of your opponent's Digimon. (Trash the top card. You can't trash past level 3 cards.) Then, delete 1 of your opponent's Digimon with a play cost of 3 or less.