Counter target spell. That spell's controller reveals their hand.

Target player exiles two permanents they control with different mana values.

Exile target creature. Create a token that's a copy of it except it's a Ruin artifact instead of its other types and it has spellcharge X, where X is its mana value.

Exile target nonland permanent. You gain 1 life for each counter on that permanent.

When Kakomanties Circle enters, create a 2/2 black Zombie creature token.
Whenever a creature you control dies, each opponent loses 1 life and you gain 1 life.

Equipped creature gets +2/+1.
Equip {VP}{VP}

Create a 1/2 green Spider creature token with reach for each color of mana spent to cast this spell.

Choose one. If your devotion to green is three or greater, you may choose another. The same is true for devotion to white.
• Permanents you control gain hexproof until end of turn.
• Create a token that's a copy of an Aura you control.
• Each opponent sacrifices a creature with power 4 or greater.

Karda's Emmisary is a 5/5 Illusion enchantment creature as long as you control three or more enchantments.

As Karda's Legacy enters, choose Iroas or Mogis.
• Iroas — Whenever you attack, create a 2/1 red Soldier creature token that's tapped and attacking.
• Mogis — Whenever a nontoken creature you control enters or dies, Karda's Legacy deals 1 damage to each opponent.

Choose one. If your devotion to blue is three or greater, you may choose another. The same is true for devotion to red.
• Return target sorcery card from your graveyard to your hand.
• Return target nonland permanent to its owner's hand.
• Destroy target artifact.

Destroy target monocolored creature. Make a pledge.

Choose one. If your devotion to green is three or greater, you may choose another. The same is true for devotion to red.
• Put two +1/+1 counters on target creature.
• Target creature you control fights target creature you don't control.
• Klothys's Judgment deals 3 damage to target player.

Koios, Spear of Karda enters with a number of additional loyalty counters on him equal to your devotion to red.
[+1]: Exile the top three cards of your library. You may cast one of them.
[–3]: Koios deals damage to any nonplayer target equal to your devotion to red.
[–X]: Choose up to X target creatures with total mana value X or less. For each creature chosen this way, create a token that's a copy of it, except it has haste. Sacrifice those tokens at the beginning of the next end step.

Choose one. If your devotion to green is three or greater, you may choose another. The same is true for devotion to blue.
• Create two tapped tokens that are a copy of a land you control.
• Draw three cards.
• Untap up to three lands you control.

Equipped creature gets +3/+1.
Whenever a Ruin you control becomes spellcharged, you may attach Landmark Blade to it.
Equip {3}

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}

Target creature gets +3/+3 and is a Flagbearer in addition to its other types until end of turn. Then if there are six or more creature types among creatures you control, draw a card.

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.

Enchant creature
When Left to the Sea enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Choose one —
• Counter target spell unless its controller pays {3}.
• You gain 3 life and draw a card.

Target creature gets +2/+0 and gains indestructible and lifelink until end of turn.

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.

Choose one —
• Draw three cards.
• Return up to two target creatures to their owners' hands.