Obscura Ascendancy

When this enchantment enters, put a +1/+1 counter on each creature you control.

Whenever a nontoken creature you control dies, create a 1/1 white Spirit creature token with flying.

Whenever you cast an enchantment spell, you get an experience counter.

: Create a white and black Spirit enchantment creature token. It has "This creature's power and toughness are each equal to the number of experience counters you have."

Enchant creature

When this Aura enters, put a +1/+1 counter on enchanted creature.

Enchanted creature has flying.

Whenever a creature you control enters, you may return this Aura to its owner's hand.

Flying

When The Master of Keys enters, put X +1/+1 counters on it and mill twice X cards.

Each enchantment card in your graveyard has escape. The escape cost is equal to the card's mana cost plus exile three other cards from your graveyard. (You may cast cards from your graveyard for their escape cost.)

: Put a +1/+1 counter on target creature you control.

Whenever one or more +1/+1 counters are put on a creature you control, put that many growth counters on this enchantment.

At the beginning of your upkeep, if this enchantment has twenty or more growth counters on it, you win the game.

Whenever this creature enters or becomes the target of an Aura spell, create a 1/1 white Spirit creature token with flying.

Disturb (You may cast this card from your graveyard transformed for its disturb cost.)