Indulgence
When Lost in the Moment enters, draw a card then discard a card.
Whenever you indulge, each opponent mills four cards.

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.

Experience
Whenever Loyal Firestarter attacks, you may cast an instant or sorcery spell from your hand with mana value less than or equal to Loyal Firestarter's power without paying its mana cost.

Vigilance
{2}{W}: Return another target permanent you control to its owner's hand. Activate only as a sorcery.

Target creature you control gets +2/+0 and gains indestructible until end of turn.
Undercover

If a triggered ability of equipped creature would trigger, it triggers an additional time.
Equip {2}

At the beginning of combat on your turn, you may discard a card or put a journeyed card you own in exile into your graveyard. If you do, journey.

Whenever Luna enters or phases in, each player loses 1 life.
Whenever a player casts a spell or a creature attacks, Luna phases out.

Whenever Lurking Vyrkolakas attacks, exile target card from a graveyard. If a nonland card was exiled this way, put a +1/+1 counter on this creature. If a land card was exiled this way, this creature gains lifelink until end of turn.

{2}: Target creature gets +0/+3 until end of turn. Activate only as a sorcery and only once each turn.

Draw two cards. If you don't control an artifact creature, you lose 3 life.

Whenever you disturb the peace, create a 1/1 black Warrior creature token and you lose 1 life.

Harness
Magnitude deals X damage to each player and each creature without flying that didn't harness it.

Destroy target creature or planeswalker if it has mana value 3 or less or if you control a legendary creature.

Trample
When Main Street Hooligang enters, if you control a green permanent, you may have Main Street Hooligang fight target creature.

Counter target spell unless its controller pays {2}. That player mills three cards.

Until end of turn, target creature gets +2/+2 and gains trample and “Whenever this creature deals combat damage to a player, return target permanent card with mana value less than or equal to the damage dealt from your graveyard to your hand.”

Discard a card: Man of Faith gains first strike and lifelink until end of turn.
Reflect {4}{U}

{T}: Add one mana of any color.
Whenever you cast a multicolored spell, untap Mana Harvesters. This ability triggers only once each turn.

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.

Mantra of Fire deals X damage to any target, where X is 2 plus the number of Mantra cards in your graveyard.

Up to two target creatures can't block this turn.
Maneuver

When Marie Laurent enters, you may search your library for a card named Hans Nehmann or Diago Maldovo and reveal that card. If you do, shuffle, then put the card on top of it.
Legendary Allies you control have double strike.

You lose life equal to the number of cards you've drawn this turn, then draw a card. You may repeat this process any number of times.

At the beginning of combat on your turn, you may have target Advisor you control get +2/-1 until end of turn.