When Demographer enters, draw a card, then discard a card. When you discard a nonland card this way, make a pledge.
{2}, {T}: Draw a card, then discard a card. When you discard a nonland card this way, make a pledge.

Enchant creature
Enchanted creature gets -4/-0 and loses flying.

Whenever Devourer of Fortunes enters or attacks, return up to one target instant or sorcery card in a graveyard or creature on the battlefield to its owner's hand. You may cast a copy of it, and may spend mana of any type to cast it.

{2}{U}{U}, Exile Digitize the Analog World from your hand: At the beginning of your next upkeep, you may cast Digitize the Analog World from exile without paying its mana cost. Activate only as a sorcery.
Return all nonartifact, nonland permanents to their owner's hands.

This spell can't be countered except by spells named Diss Track.
Counter target spell.

Counter target spell.
Draw a card if you control a legendary permanent.

Return target creature to its owner's hand. If you've amped it up this turn, that player puts it on top or bottom of their library instead.

Dormant Monstrosity enters tapped with three stun counters on it.
{1}{U}, Remove a counter from Dormant Monstrosity: Draw a card.

When Dream Catcher enters, return target exiled card with flashback you own to your hand.

Flying
Amity — Whenever you attack with Dustwing Butterfly and exactly one other creature, create a tapped and attacking token that's a copy of target creature you control, except it's 1/1 and isn't legendary. Sacrifice that token at the beginning of the next end step.

Dynamo Glyphs enters with six minus X charge counters on it.
Whenever a creature you control attacks, remove a charge counter from Dynamo Glyphs. Then if it has no charge counters on it, sacrifice it. If you do, draw three cards.

Scry 1, then draw a card. If you control a Kraken, Leviathan, Octopus, or Serpent, instead scry 3, then draw a card.

Favored
Whenever your Champion attacks, it can't be blocked this turn.

Scry 3, then draw three cards.
If this spell's flashback cost was paid, take an extra turn after this one.
Flashback {7}{U}{U}

Draw a card.
Make a pledge, then make a pledge again.

{1}{U}, {T}, Sacrifice Emulation Expert: Gain control of target creature you don't control with mana value 3 or less. Its owner creates a tapped token that's a copy of it. Activate only as a sorcery.

When Enlightenment enters, draw a card for each color of mana spent to cast it.
You have no maximum hand size.

Enchant creature
When Enrapturing Lights enters, untap enchanted creature. It gains haste until end of turn.
You control enchanted creature.

Exile up to two target artifacts, creatures, or lands you control, then return them to the battlefield under their owner's control. If any of those permanents are Ruins, they become creatures in addition to their other types until end of turn.

Target creature gains hexproof until end of turn. Teach it vigilance.

Decayed
{2}{U}, Exile Expendable Researcher from your graveyard: Return target instant or sorcery card from your graveyard to your hand. Activate only as a sorcery.

Draw three cards.
Surface {5}{U}{U}

Ward {2}
Spells and abilities you control that target Fabulous Serpent cost {2} less.
{2}{U}: Creatures you control get +1/+1 until end of turn.

Flying
Whenever an artifact without a loop counter on it is put into your graveyard from the battlefield, return it to the battlefield with a loop counter on it.
{2}{U}: Remove a loop counter from target artifact.

Target player mills two cards, then mills two more cards for each card named Fathomless Dominion in your graveyard.