In these decks, Shardless Agent enables an easy two-card combo with either Living End or Crashing Footfalls, making those lists very consistent and powerful strategies and the best combo decks in the format
no foils $30 Seabrook Pokemon 4X Scarlet & Violet White Flare & Black Bolt Booster Boxes $0 Pearland Pokemon Card: Mega Greninja EX 122/086 $140 Houston 2001 Pokmon Southern Islands Collection Sealed Binder Set
Chaos Core X DARK Level 3 [ FiendEffect ] ATK 0 DEF 0 When either player activates a card or effect that targets this card, or when your opponent's monster targets it for an attack (Quick Effect): You can send up to 1 each of "Uria, Lord of Searing Flames", "Hamon, Lord of Striking Thunder", and "Raviel, Lord of Phantasms" from your hand and/or Deck to the GY, and if you do, place 1 Phantasm Counter on this card for each card sent to the GY, and if you place at least 1, you take no battle damage this turn
You could build the deck around just one, but a mixture of a few will make your deck stand up better against different commander players