Relentless Dead Retro Frame

“<div class="SecretLair"><strong> Seven Dwarves</strong></div><br>Menace <br> When Relentless Dead dies, you may pay B. If you do, return it to its owner's hand. <br> When Relentless Dead dies, you may pay X. If you do, return another target Zombie creature card with converted mana cost X from your graveyard to the battlefield.”