Black's strengths are destroying creatures, forcing opponents to discard cards, making players lose life, and returning creatures from graveyards
However, you can only activate it during the Battle Phase, and while you can use your own monster to trigger it, it's too slow at that point and your opponent can just not attack to avoid triggering it themselves
Due to that uniqueness, coupled with Secret Lairs finite production, many of these are top-dollar cards that will likely not be seen anywhere except the drops in which they were originally found
While it is restricted to once a turn, being able to cast creatures from your graveyard without having to pay any extra mana is powerful in a way that isn't obvious at first
He's not the most popular villain, but Lysandre's unique design gives this card some distinctive eye appeal as it differentiates itself from its peers
Trade-in provides a way to discard all of the heavy blue-eyes monsters and sets them up for graveyard recovery cards like call of the haunted and Silvers Cry
