Whenever you cast an instant or sorcery spell, surveil 1. Lanternlight Assailant gets +1/+0 and gains flying until end of turn.
As long as there are five or more instant and/or sorcery cards in your graveyard, instant and sorcery spells you cast cost {1} less to cast.

Lavatorn Fields enters tapped unless you control a basic Swamp or a basic Mountain.

Choose one —
• Target attacking creature you control gets +1/+1 until end of turn for each creature you control.
• Choose target creature you control. Create a number of 1/1 white Human creature tokens equal to that creature's power.
Flashback {3}{R}{W}

Instant and sorcery spells you cast cost {1} less to cast.
{2}{U}: Level 2
When this Class becomes level 2, you may return target instant or sorcery card from your graveyard to your hand.
{3}{U}: Level 3
Once each turn, when you cast an instant or sorcery spell, you may copy that spell. You may choose new targets for the copies.

Solidarity
At the beginning of combat on your turn, target creature you control gets +2/+2, gains indestructible, and becomes an Avatar in addition to its other types until end of turn.

When Leyrune Collector enters, look at the top four cards of your library. You may reveal an artifact or land card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. If you revealed a land this way, you may put a land card from your hand onto the battlefield tapped.
Wander {3}{G}{U}

At the beginning of your end step, you gain 1 life. Then if it's your first turn of the game or you discarded a card named Leystone of Being this turn, create an X/X white Avatar creature token, where X is the difference between your life total and your starting life total.
Cycling {W}

At the beginning of your end step, scry 1. Then if it's your first turn of the game or you discarded a card named Leystone of Depths this turn, draw a card.
Cycling {U}

At the beginning of your end step, untap another permanent. Then if it's your first turn of the game or you discarded a card named Leystone of Growth this turn, put a growth counter on that permanent. It gains “{T}: Add one mana of any type.”
Cycling {G}

At the beginning of your end step, each player mills two cards. Then if it's your first turn of the game or you discarded a card named Leystone of Ruin this turn, target player mills four cards.
Cycling {B}

At the beginning of your end step, Leystone of Storms deals 1 damage to each opponent. Then if it's your first turn of the game or you discarded a card named Leystone of Storms this turn, Leystone of Storms deals 1 damage to any target.
Cycling {R}

{T}: Add {R}{R}{R}. Spend this mana only to cast creature spells. If that mana is spent on a creature spell, it enters with an additional haste counter and decayed counter on it.

Attacking creatures you control have first strike.
Whenever you amp it up, draw a card.

{1}, {T}: Target land you control becomes a 4/4 Elemental creature with lifelink, haste, and “When this creature dies, draw a card.” It's still a land. Sacrifice it at the beginning of the next end step.

Flash
Flying, lifelink
Your opponents can't create tokens.

Kraken, Leviathan, Octopus, and Serpent spells you cast cost {X} less to cast, where X is your devotion to blue.

When Lost Resistor dies, you gain 1 life.
Cybersoul {X}{X}{W}

Create X blue Shrine enchantment tokens named Unmarked Shrine with “At the beginning of your upkeep, each opponent mills a card.”
{1}{U}, Exile Lost to Memory from your graveyard: Draw two cards. Activate only if an opponent has eight or more cards in their graveyard.

Integrate the top two cards of target player's library. They lose 2 life, and you gain 2 life.
Whenever a permanent you control with two or more cards integrated onto it dies, you may pay {B}. If you do, return Lure into Lunacy from your graveyard to your hand.

Lush Oasis enters tapped unless you control a basic Forest or a basic Island.

Magdalena Bay enters tapped.
{T}: Add {G}, {W}, or {U}.
{VP}{VP}{VP}{VP}, Discard Magdalena Bay: Target creature gets +3/+3 and gains menace until end of turn.

Each opponent separates the creatures they control into two piles. For each opponent, you choose one of their piles. Each opponent sacrifices the creatures in their chosen pile.

{2}, {T}: Exile target creature you control, then reveal the top card of your library. If the revealed card is a creature card, put it onto the battlefield. Otherwise, return the exiled card to the battlefield under its owner's control.

Flying
When Malicious Skycleaver enters, pay any amount of life. It deals that much damage to each other creature.
Cybersoul {7}{B}{B}

Enchant land you control
Enchanted land is a 2/2 Elemental creature with vigilance, haste, and “{T}: Add two mana of different colors.” It's still a land.
If enchanted land would leave the battlefield, instead sacrifice Manifest the Lightveins and that land gains indestructible until end of turn.