Q1: If I use this card when my opponent has no level 3 Digimon, can I still activate the effect that places this card in my battle area?
Yes, you can.
Q2: If my opponent doesn't trash an Option card from their hand for this card's Delay effect, does my opponent gain 2 memory?
No, you gain 2 memory. This effect makes your opponent choose between trashing an Option card from their hand or losing 2 memory.
Tarnished Hero EX4-070 C While you have a green Digimon or Tamer in play, you may use this card without meeting its color requirements. [Main] Delete 1 of your opponent's level 3 Digimon. Then place this card in your battle area. [Main] <Delay> (After this card is placed, by trashing it the next turn or later, activate the effect below.) • Your opponent may trash 1 Option card in their hand. If they do not trash a card, gain 2 memory. --- [Security] Place this card in its owner's battle area.
Tarnished Hero EX4-070 C While you have a green Digimon or Tamer in play, you may use this card without meeting its color requirements. [Main] Delete 1 of your opponent's level 3 Digimon. Then place this card in your battle area. [Main] <Delay> (After this card is placed, by trashing it the next turn or later, activate the effect below.) • Your opponent may trash 1 Option card in their hand. If they do not trash a card, gain 2 memory. --- [Security] Place this card in its owner's battle area.
Tarnished Hero EX4-070 C While you have a {{Colour|green}} Digimon or Tamer in play, you may use this card without meeting its color requirements. [Main] Delete 1 of your opponent's level 3 Digimon. Then place this card in your battle area. [Main] <Delay> • [Main] Your opponent may trash 1 Option card in their hand. If they do not trash a card, gain 2 memory. ---
汚れた英雄 EX4-070 C 緑の自分のデジモンかテイマーがいる間、このカードは色条件を無視して使用できる。 【メイン】Lv.3の相手のデジモン1体を消滅させる。その後、このカードをバトルエリアに置く。 【メイン】≪ディレイ≫(置いた次のターン以降にこのカードを破棄することで、効果を発揮する) • 相手は相手の手札からオプションカード1枚を選んで破棄できる。破棄しなかったなら、メモリー+2。 --- 【セキュリティ】このカードをバトルエリアに置く。