Cometmon (EX10-030) - Sinister Order

[[App Fusion] [Warpman] & [Weatherdramon].Cost 0]
If 2 such cards are linked together, stack the link card on top and digivolve.
[Collision]
[On Play] [When Digivolving] You may link 1 level 4 or lower Digimon card from your hand or this Digimon's digivolution cards to this Digimon without paying the cost:
[All Turns] [Once Per Turn] When effects trash any of this Digimon's link cards, 1 of your opponent's Digimon gets -8000 DP for the turn.
Link Effect DP +4000
[Link] [Appmon] trait: Cost 3
(Plug this card from the hand or battle area sideways into the specified Digimon in the battle area.)
[All Turns] [Once Per Turn] When this Digimon would leave the battle area, by trashing 1 of its link cards, it doesn't leave.