Essence of the Eye
Creatures you control have prowess.
Whenever you cast a spell as the same name of one in your graveyard, put a +1/+1 counter on each creature you control.
Whenever you cast an instant or sorcery spell, you may draw a card. ?If you do, discard a card.
Artifact - Equipment
Equipped creature gets +1/+1, and has Flying
If the Equipped Creature is an Angel, it gets "Whenever the Equipped creature attacks, tap target creature."
When the Equipped Creature dies, transform ~.
Wrathful Spirit B Creature - Spirit
Whenever a creature dealt combat damage by Wrathful Spirit dies this combat step, transform Wrathful Spirit.
Going to go weird and 4th dimensional here: Make the above card a triple faced card
I don't know how the previous card transforms into that or know how you expect a two sided card to have a third side. Maybe an "evolution" such as Pokemon with separate cards to stack on each other for each evolution. However, I like pushing boundaries myself, but that is kind of pushing it lol
Iron Scroll Advisor
Creature - Bird Monk
Whenever a player draws a card, that player may reveal it. If not, that player must discard a card.
At the end of your turn, if no spells were cast, transform ~.
Enchantment - Aura
When ~ enters the battlefield, remove all but one loyalty counters from enchanted planeswalker.
At the beginning of your end step, as long as enchanted planeswalker has four or more loyalty counters on it, transform ~.
I have no idea what to do with Spark, to be honest.
Maiden of Flaming Blades ((R/W))
Creature - Angel Avatar
When this creature transforms into ~, you may search your library for an Equipment card, put it onto the battlefield, and attach it to a creature you control. Then shuffle your library.
Equipped creatures you control have double strike.
Creature - Human Warrior
At the beginning of your end step, if a creature dealt damage by ~ died this turn, transform ~.
Artifact Creature -- Golem
When this creature transforms into Goliath's Remnant, it deals 5 damage to each blocking creature.
Whenever Goliath's Remnant blocks a creature, it deals 1 damage to that creature.
Ronin's Apprentice -- 1R
Creature -- Human Samurai
Haste, Bushido 1
At the end of your turn, if a creature dealt damage by Ronin's Apprentice died this turn, transform Ronin's Apprentice.
Ronin's Avenger Creature - Human Samurai
When this creature transforms into ~, it deals 1 damage to each other creature dealt combat damage this turn. If a creature you control would be put into the graveyard this way, transform it.
Vigilance, bushido 4
Active Vestige (W/U)(U/B)(B/R)(R/G)(G/W) Enchantment - AuraM
When ~ enters the battlefield, move all but one loyalty counters from all planeswalkers onto enchanted planeswalker.
Enchanted planeswalker has all loyalty abilities of each other planeswalker on the battlefield with three or fewer loyalty counters on it.
At the beginning of your end step, if you activated a loyalty ability of an opponents planeswalker this turn, transform ~.
Legendary Artifact WURBG
Planeswalker spells you cast costs 2 less to play.
Planeswalkers you control have the loyalty abilities of each other planeswalker on the battlefield. T: Put a loyalty counter on a planeswalker you control. Avctivate this ability any time you could play a sorcery.
Creature - Hippogriff
When ~ dies, return it to the battlefield transformed and attached to the paired creature.
(W) Enchantment - Aura
When this creature transforms into ~, pair any number of unpaired creatures with enchanted creature.
Any number of unpaired creatures may pair with enchanted creature.
Creatures paired with enchanted creature get +0/+1 and have reach.
Scampering Vedalken3(U/P)(R/P) Creature - Vedalken Wizard
Dash 1(U/P)(R/P) (U/P)(R/P), Q: If only mana was used to activate this ability, shuffle any number of cards from your hand into your library then draw that many cards. If only life was used to activate this ability, transform it. 2/3
Without considering snow, legendary, flip cards, tokens, the 6 basic colors, including colorless, or the 26 multicolor combinations, etc. here are the total number of permanent types to determine the total number of transformations amongst permanents besides transforming into their original card types.
6 basic land types
7 artifact types
16+ enchantment types
All creature types + planeswalkers
I'm almost wondering if we could try to figure out a checklist that we can go by to try to make all possible transformation types collectively.
Prism Bird (WURBG)
Creature - Bird
~ gets +1/+1 for each charge counter on ~.
Remove a charge counter on ~: ~ gains protection from colored spells and permanents until end of turn.
Creature - Fish Spirit
Flying 2UT Sacrifice ~: Return an artifact or enchantment from your graveyard to your hand.
Sacrifice Three Artifact and/or Enchantments: return ~ from your graveyard to the battlefield transformed.
Moonpool Mantra U Enchantment Artifact
Whenever an artifact you control leaves play, return target enchantment from your graveyard to the battlefield.
Whenever an enchantment you control leaves play, return target artifact from your graveyard to the battlefield. 2U, t, Exile ~: Return all artifacts and/or enchantments in all graveyards to the battlefield under their owners control.
Enchantment - Aura (Enchant graveyard)
Whenever a creature is put into enchanted graveyard, its owner loses 1 life.
At the beginning of each end step, if a player lost 5 or more life this way, transform ~. "The graveyard isn't a shift, it's where you shift."
Ascendant of BloodB
Creature - Demon
At the beginning of your upkeep, You lose 4 life.
Next: Cursed Cameo3
At the beginning of your upkeep, ~ deals 3 damage to you. T: Target opponent gains control of ~.
When ~ is sent to the graveyard from the battlefield, return it to the battlefield transformed.
Tainted Sphere Artifact
When this artifact transforms into ~, exchange control of it with target nonland permanent you don't control.
At the beginning of each players upkeep, as long as ~ is untapped, ~'s controller loses 1 life.
Pallid Presence2(W/P)(W/P) Creature - Spirit
Whenever an opponent gains life, you lose that much.
Whenever an opponent pays life, you gain that much.
At the beginning of each players end step, if an opponent either gained, or paid 5 life or more this turn, transform ~.
Dawn of the Stallion(G/W)
Lands you control have "T: Add GG or WW to your mana pool." The Rhinewood is a land of plenty accessible to precious few.
The Great Glass City7
When The Great Glass City is put into your graveyard from the battlefield, return it to the battlefield transformed under your control at the beginning of the next end step. "Such beauty. Such opulent splendor, and haunting stillness. I must investigate further." - The Journal of Tyraea the Wanderer
Dethos the Imprisoned GodC
Legendary Creature - God Avatar
~ is indestructible
As long as your devotion to Coloress Mana is five or more, ~ gets +4/+4 and Hexproof.
9/9 "The city was not a place to live but a prison. I must escape quickly." - The Journal of Tyraea the Wanderer
Next: Bottled Wishes4
~ enters the battlefield with three Wish counters on it. XT Remove a Wish counter on ~: Search your library for a non-land card with CMC of X or less. Reveal it and put it into your hand, then shuffle your library after. Do this any time you could play a sorcery.
When there are no Wish counters on ~, transform it.