Rulings
Q1: If the Security effect, the "when security is checked" effect, and the "when security is reduced" effect are triggered simultaneously, in which order do they activate?
Security] effects are activated first. Security] effects, if checked, will be activated immediately without pending activation. Other triggered effects are activated from the turn player's side.
Q2: Which card can be activated by this card's All Turns effect?
One Digimon with the text "DRACOMON" or one Digimon with the text "EXAMON".
Q3: What do you mean by "cards with text?"
It refers to cards with the specified word or icon included in "name, trait, effect, inherited effect, <Overflow X>, jogress, digivolution requirements, burst digivolution". For example, a card with the text "Knightmon" refers to a card whose name is "Dark Knightmon" or whose effect says "Knightmon".
Q4: Which digivolution card's inherited effect is triggered when it leaves?
The cards are either "cards with the text 'DRACOMON'" or "cards with the text 'EXAMON'".
Q5: When several of my Digimon with the text "DRACOMON" or "EXAMON" leave the Battle Area at the same time outside of battle, if I activate the digivolved effect of this card, will all of those Digimon not leave?
Yes, all those Digimons will not leave. The digivolution card's inherited effect is an effect that affects the whole card, not just any card.
Data Sources
Lv.6 Slayerdramon BT20-027 R Mega | Vaccine | Dragonkin [Digivolve] [Wingdramon]/[Groundramon]: Cost 3 <Piercing> (When this Digimon attacks and deletes an opponent's Digimon, it performs any security checks it normally would.) [On Play] [When Digivolving] Trash any 3 digivolution cards of 1 of your opponent's Digimon. Then, delete 1 of their Digimon with no digivolution cards. [All Turns] [Once Per Turn] When your opponent's security stack is removed from, 1 of your Digimon with [Dracomon] or [Examon] in its text may unsuspend. --- Inherited: [All Turns] [Once Per Turn] When any of your Digimon with [Dracomon] or [Examon] in their texts would leave the battle area other than in battle, by suspending this Digimon, they don't leave.
Lv.6 Slayerdramon BT20-027 R Mega | Vaccine | Dragonkin [Digivolve] [Wingdramon]/[Groundramon]: Cost 3 <Piercing> (When this Digimon attacks and deletes an opponent's Digimon, it performs any security checks it normally would.) [On Play] [When Digivolving] Trash any 3 digivolution cards of 1 of your opponent's Digimon. Then, delete 1 of their Digimon with no digivolution cards. [All Turns] [Once Per Turn] When your opponent's security stack is removed from, 1 of your Digimon with [Dracomon] or [Examon] in its text may unsuspend. --- Inherited: [All Turns] [Once Per Turn] When any of your Digimon with [Dracomon] or [Examon] in their texts would leave the battle area other than in battle by suspending this Digimon, they don't leave.
Lv.6 スレイヤードラモン BT20-027 R 究極体 | ワクチン種 | 竜人型 「ウイングドラモン」/「グラウンドラモン」:コスト3 ≪貫通≫ 【登場時】【進化時】相手のデジモン1体の進化元を選んで3枚破棄する。その後、進化元を持たない相手のデジモン1体を消滅させる。 【お互いのターン】[ターンに1回]相手のセキュリティが減ったとき、「ドラコモン」/「エグザモン」の記述がある自分のデジモン1体をアクティブにできる。 --- Inherited: 【お互いのターン】[ターンに1回]「ドラコモン」/「エグザモン」の記述がある自分のデジモンがバトル以外でバトルエリアを離れるとき、このデジモンをレストさせることで、離れない。