They dont have a coherent set of mechanics or abilities associated with them, but they do tend to be either hard to remove in some way or somehow disruptive or both
Graded PSA 10 copies trade actively on the secondary market and command a clear premium over raw Widely tracked across major price guides as the top card of the set The "Bubble Mew" nickname is everywhere in listings and posts, and the card shows up constantly in collection showcases and grail lists
If an ability of the equipped creature states that it has flying "as long as" a condition is true, that condition becoming true won't cause the creature to gain flying
It can only be activated when Necrovalley is on the field, and when it is, Royal Tributes sends all Monsters in both hands to the Graveyard
Surge's Voltorb #84Common $1.07 Lt
Its headline foil rare, 005-048-elsa-the-fifth-spirit, is an amazing card thats heavily played in the competitive scene