If youre looking for ideas, a good place to start is a Lost Box deck looking at some of the best cards from the Lost Origin set should get your gears turning
Icon of Ancestry Icon of Ancestry combines an anthem effect, which is something that you already want in typal decks, with a form of card advantage
It bolsters a large number of powerful meta staples such as [[Ash Blossom & Joyous Spring]] and [[Infinite Impermanence]] so it is the perfect Deck to build on a budget too

Aggressive Symbiosis Alien Symbiosis Ancestral Vengeance Animate Dead Animate Graveyard Archnemesis Artifact Possession Artificer's Hex Aspect of Gorgon Aspect of Lamprey Banewasp Affliction Binding Agony Blessing of Leeches Blight Boon of Emrakul Brink of Disaster Cartouche of Ambition Cast into Darkness Casting of Bones Caustic Tar Changing Loyalty Chime of Night Chorale of the Void Claim of Erebos Clawing Torment Clinging Darkness Cloak of Confusion Clutch of Undeath Coerced to Kill Coercive Impetus Coils of the Medusa Consecrated by Blood Contaminated Bond Contaminated Ground Corrupted Roots Corrupted Zendikon Cracked Skull Crippling Blight Crown of Suspicion Cruel Reality Curse Artifact Curse of Death's Hold Curse of Disturbance Curse of Fool's Wisdom Curse of Leeches Curse of Misfortunes Curse of Oblivion Curse of Shallow Graves Curse of Thirst Curse of Vengeance Curse of the Restless Dead Cursed Flesh Cursed Land Dance of the Dead Dark Favor Dark Privilege Dead Man's Chest Dead Weight Death Watch Death's Approach Debilitating Injury Demonic Appetite Demonic Embrace Demonic Torment Demonic Vigor Despondency Deviant Glee Discreet Retreat Dragon Shadow Dying Wail Dying Wish Edge of the Divinity

5/64 - Delibird The "Double" Holo variant will have no white border around Delibird, with the change particularly noticeable on the top of Delibird's head
All you need is a special energy, and that could be ANY special energy