- You may play 1 Leviamon from your trash without paying the cost.
Rulings
Q1: Does this card's "if this effect trashed a card with the Seven Great Demon Lords trait" refer to the card trashed from my hand or my opponent's level 6 or lower Digimon that I deleted?
It refers to the card trashed from your hand.
Q2: If an effect plays an opponent's Digimon while this card is in the battle area, do I have to activate Delay?
No, Delay effects are "trash this card in your battle area to activate" effects, therefore you can choose to not trash the card in order to prevent them from activating.
Q3: When an effect plays an opponent's Digimon into the breeding area, does this card's Delay activate?
No, it doesn't.
Q4: If my opponent uses BT13-020 ShineGreymon: Burst Mode's effect to play Marcus Damon as a Digimon, does this card's Delay activate?
No, it doesn't. Marcus Damon is played as a Tamer by BT13-020 ShineGreymon: Burst Mode effect and then it's treated as being a Digimon by an effect, therefore it isn't considered to be played as a Digimon.
Q5: Does this card's Delay also activate when one of my effects plays an opponent's Digimon?
Yes, it activates.
Data Sources
Biting Crush EX5-069 R [Main] By trashing 1 card in your hand, delete 1 of your opponent's level 6 or lower Digimon. If this effect trashed a card with the [Seven Great Demon Lords] trait, place this card in the battle area. [All Turns] When an effect plays an opponent's Digimon, <Delay> • You may play 1 [Leviamon] from your trash without paying the cost. --- [Security] Activate this card's [Main] effect.
Biting Crush EX5-069 R [Main] By trashing 1 card in your hand, delete 1 of your opponent's level 6 or lower Digimon. If this effect trashed a card with the [Seven Great Demon Lords] trait, place this card in the battle area. [All Turns] When an effect plays an opponent's Digimon, <Delay> • You may play 1 [Leviamon] from your trash without paying the cost. --- [Security] Activate this card's [Main] effect.
Biting Crush EX5-069 R [Main] By trashing 1 card in your hand, delete 1 of your opponent's level 6 or lower Digimon. If this effect trashed a card with the [Seven Great Demon Lords] trait, place this card in the battle area. [All Turns] When an effect plays an opponent's Digimon, <Delay> • You may play 1 [Leviamon] from your trash without paying the cost. ---
ロストルム EX5-069 R 【メイン】自分の手札を1枚破棄することで、Lv.6以下の相手のデジモン1体を消滅させる。この効果で特徴に「七大魔王」を持つカードを破棄したなら、このカードをバトルエリアに置く。 【お互いのターン】効果で相手のデジモンが登場したとき、≪ディレイ≫。 • 自分のトラッシュから、「リヴァイアモン」1枚をコストを支払わずに登場できる。 --- 【セキュリティ】このカードの【メイン】効果を発揮する。