Enchant your library
Enchanted library is an artifact creature on the battlefield with power and toughness each equal to the number of cards in it. It's still a library.
If enchanted library would leave the battlefield, exile Animate Library instead.

Flash
Enchant instant or sorcery spell on the stack
When this Aura becomes attached to an instant or sorcery, put that card onto the battlefield under its owner's control. It's a creature in addition to its other types with power and toughness each equal to its mana value.
When this Aura leaves the battlefield, enchanted card's owner sacrifices it unless they cast it.

Enchant land
You control enchanted land.

Enchant creature
Enchanted creature can't be the target of spells and can't be enchanted by other Auras.

Enchant creature
Enchanted creature doesn't untap during its controller's untap step.
At the beginning of the upkeep of enchanted creature's controller, that player may discard a card at random. If the player does, untap that creature.

Enchant creature
All creatures attack enchanted creature's controller each combat if able.
When enchanted creature dies, draw two cards.

When this enchantment enters, create two 1/1 blue Merfolk creature tokens with hexproof.
: Target Merfolk can't be blocked this turn.

Enchant creature
Enchanted creature can't be blocked.
Whenever enchanted creature attacks, scry 1.

Flash
Enchant creature you control
When this Aura enters, enchanted creature gains hexproof until end of turn.
Enchanted creature gets +1/+2.

As this enchantment enters, choose a creature type.
Creatures you control are the chosen type in addition to their other types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

Enchant creature
Enchanted creature gets +1/+1 and has flying.

Each player can't cast more than one spell each turn.

Instant and sorcery spells cost less to cast.

Enchant creature
Enchanted creature has flying.
Aura swap

At the beginning of each end step, if you drew two or more cards this turn, you may put a quest counter on this enchantment.
As long as this enchantment has six or more quest counters on it, if you would draw a card, you may instead search your library for a card, put that card into your hand, then shuffle.

Cumulative upkeep
: Target creature gains flying until end of turn.

(Gain the next level as a sorcery to add its ability.)
The first artifact spell you cast each turn costs less to cast.
: Level 2
When this Class becomes level 2, reveal cards from the top of your library until you reveal an artifact card. Put that card into your hand and the rest on the bottom of your library in a random order.
: Level 3
At the beginning of your end step, create a token that's a copy of target artifact you control.

, Discard an artifact card: Search your library for an artifact card with mana value 1 or less, reveal it, put it into your hand, then shuffle.

At the beginning of your upkeep, put a time counter on this enchantment.
Once each turn, you may pay rather than pay the mana cost for a spell you cast with mana value X or less, where X is the number of time counters on this enchantment.

Flash
When this enchantment enters, exile target spell.
Your opponents can't cast spells with the same name as the exiled card.
When this enchantment leaves the battlefield, return the exiled card to its owner's hand.

Enchant creature
Enchanted creature gets -2/-0.
If Spectral Binding would be put into a graveyard from anywhere, exile it instead.

Convoke
Enchant creature
When this Aura enters, draw a card.
Enchanted creature gets +2/+2 and has flying.

Return this enchantment to its owner's hand: Draw three cards, then discard four cards.

Other enchantments have "At the beginning of your upkeep, sacrifice this enchantment unless you pay ."

Enchant creature
, Tap an untapped creature you control: Untap enchanted creature.

Enchant creature
Enchanted creature gets +2/+2 for each Aura attached to it and has vigilance.

Enchant creature
Enchanted creature can't be blocked unless defending player pays for each creature they control that's blocking it.

(Gain the next level as a sorcery to add its ability.)
You have no maximum hand size.
: Level 2
When this Class becomes level 2, draw two cards.
: Level 3
Whenever you draw a card, put a +1/+1 counter on target creature you control.

Exile a creature card from your graveyard and pay its mana cost: Create a token that's a copy of that card. Activate only as a sorcery.

Nonbasic lands don't untap during their controllers' untap steps.