When you cast Bloodline Culling you can have a creature get -5/-5 until end of turn, which can be useful for killing off any specific threat, but especially those that are indestructible, as they dont die through normal means
5 Iono's Bellibolt ex Iono's Bellibolt ex allows you to attach as many Basic Lightning Energy cards from your hand to any of Iono's Pokemon during your turn
Whether Return of the Duelist sees play would largely depend on its synergy with the rest of the deck's strategy and if there are more effective alternatives available
To choose a creature type, you must choose an existing creature type, such as Vampire or Knight
If Bruse Tarl and Ishai are your commanders, your deck may contain cards with red, white, and/or blue in their color identity, but not cards with green or black