Etemon

(Digivolve Lv.4 w/Sukamon in name: Cost 3)

On Play When Digivolving Until the end of your opponent's turn, 1 of your opponent's Digimon gets -3000 DP and gains "Start of Your Main Phase This Digimon attacks."

Inherited effect

Opponent's Turn Once Per Turn When an opponent's Digimon attacks, you may reveal the top 3 cards of your deck. You may play 1 black or yellow Digimon card with a play cost of 3 or less among them without paying the cost. Trash the rest.