Shadowy Energy 083/084 Energy Shadowy Energy Special Energy
Unlike TCG / OCG procedures, it cannot use specifically-named ones in the Spell & Trap Zone
Getting a board full of demons isn't too hard, and drawing cards at the cost of life based on the number of demons you control is the most black-mana ability I've ever heard of
He targeted "Dark Rebellion", aiming to inflict its boosted ATK as damage to Yuto, but Yuto activated "Phantom Knights' Spear" from his Graveyard, negating the Trap and inflicting enough damage to win the Duel
There are fourteen in total: Tauros Skitty Delcatty Fletchling Hawlucha Pikipek Trumbeak Toucannon Yungoos Gumshoos Stufful Bewear Oranguru Komala These are all the Item cards in Celestial Guardians
That's exactly where Eldlich shines, constantly giving you follow-up plays and letting you stay in the game