






Q1: Can I activate the "when an effect trashes this card from the security stack" effect when this card is revealed from the security stack or when searching/looking at this card from the security stack?
No, you can't. You can only activate the "when an effect trashes this card from the security stack" when this card is directly trashed from the security stack.
Q2: Can I activate this card's "when an effect removes cards from your security stack" effect when another effect plays this card from the security stack?
Yes, you can. If this card is directly played from the security stack, it will be played at the same time it's removed from the security stack, therefore the "when an effect removes cards from your security stack" effect will trigger.
Kari Kamiya BT15-084 R When an effect trashes this card from the security stack, 1 of your opponent's Digimon gains <Security A. -1> until the end of their turn. [Start of Your Turn] If you have 2 or less memory, set it to 3. [All Turns] When an effect removes cards from your security stack, by suspending this Tamer, 1 of your opponent's Digimon gains <Security A. -1> until the end of their turn. --- [Security] Play this card without paying the cost.
Kari Kamiya BT15-084 R When an effect trashes this card from the security stack, 1 of your opponent's Digimon gains <Security A. -1> until the end of their turn. [Start of Your Turn] If you have 2 or less memory, set it to 3. [All Turns] When an effect removes cards from your security stack, by suspending this Tamer, 1 of your opponent's Digimon gains <Security A. -1> until the end of their turn. --- [Security] Play this card without paying the cost.
Kari Kamiya BT15-084 R When an effect trashes this card from the security stack, 1 of your opponent's Digimon gains <Security A. -1> until the end of their turn. [Start of Your Turn] If you have 2 or less memory, set it to 3. [All Turns] When an effect removes cards from your security stack, by suspending this Tamer, 1 of your opponent's Digimon gains <Security A. -1> until the end of their turn. --- [Security] Play this card without paying the cost.
八神ヒカリ BT15-084 R 効果でこのカードがセキュリティから破棄されたとき、相手のターン終了まで、相手のデジモン1体に≪Sアタック-1≫を与える。 【自分のターン開始時】メモリーが2以下なら、3にする。 【お互いのターン】効果で自分のセキュリティが減ったとき、このテイマーをレストさせることで、相手のターン終了まで、相手のデジモン1体に≪Sアタック-1≫を与える。 --- 【セキュリティ】このカードをコストを支払わずに登場させる。