Though not the first set to introduce Pokemon which go against their usual Energy type (you can find more information on this in our Pokemon Energy Types guide), it certainly used them in a big way
Use your other DON
"What if," he said, "you could eat the creatures once they died?" For those unaware, during Shards of Alara block, Ken designed a mechanic called devour

(Bevy of Beebles) Basri Ket Basri, Devoted Paladin Calix, Destiny's Hand Chandra Ablaze Chandra Nalaar Chandra, Acolyte of Flame Chandra, Awakened Inferno Chandra, Bold Pyromancer Chandra, Dressed to Kill Chandra, Fire Artisan Chandra, Flame's Catalyst Chandra, Flame's Fury Chandra, Flamecaller Chandra, Flameshaper Chandra, Heart of Fire Chandra, Hope's Beacon Chandra, Legacy of Fire Chandra, Novice Pyromancer Chandra, Pyrogenius Chandra, Pyromaster Chandra, Roaring Flame Chandra, Spark Hunter Chandra, Torch of Defiance Chandra, the Firebrand Comet, Stellar Pup Commodore Guff Dack Fayden Dakkon, Shadow Slayer Daretti, Ingenious Iconoclast Daretti, Scrap Savant Davriel, Rogue Shadowmage Dihada, Binder of Wills Domri Rade Domri, Anarch of Bolas Domri, Chaos Bringer Domri, City Smasher Dovin Baan Dovin, Architect of Law Dovin, Grand Arbiter Dovin, Hand of Control Ellywick Tumblestrum

On the field, for the small cost of 1000 Life Points, you can completely wipe the board of everything but Judgement Dragon
Each of these will reward you with some number of packs from a different Magic: The Gathering set - and, due to how expensive the cards can be even when you're only playing digitally, they're effectively essential to every player both old and new