You may cast this spell as though it had flash by sacrificing a creature in addition to its other costs. If you do, when it enters the battlefield, attach it to target creature you control.
Equipped creature gets +2/+0 and has “Whenever this creature deals combat damage to a player, that player discards a card.”
Equip—Pay 2 life.

Create a 1/1 colorless Construct artifact creature token, then put a +1/+1 counter on each Construct you control.

Whenever one or more creatures you control deal combat damage to a player, you draw a card unless that player discards a card.
{X}: Creatures with power X or less can't block this turn.

{T}: Add three mana of different colors.

{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.

When Disguising Barber enters the battlefield, you may have another target creature you control become a copy of any creature on the battlefield for as long as you control Disguising Barber.

Indulgence
If a source an opponent controls would deal damage to you, prevent 1 of that damage.
Whenever you indulge, create a 4/4 white Angel creature token with flying.

Whenever you attack, put a beat counter on Double-Time Drums, then equipped creature gets +2/+1 until end of turn for each counter on Double-Time Drums.
At the beginning of your end step, if you didn't attack this turn, remove all beat counters from Double-Time Drums.
Equip {2}

Create a Solidarity token. When you do, pay for and choose any number.
+{R} — Edgeland Pledge deals 2 damage to any target.
+{U} — Tap up to three target creatures.
+{G} — Create a 1/1 red Soldier creature token. It gains haste until end of turn.

Haste
Ward—Pay 2 life.
Whenever you cast a spell that targets Efimia of the Horse, create a 1/1 white Human creature token if this is the first time this ability has resolved this turn. If it's the second time, creatures you control get +1/+0 and gain haste until end of turn. If it's the third time, creatures you control gain menace until end of turn.

When Elder Soulblade enters the battlefield, search your library and/or graveyard for a creature card with mana value 2 or less. Put that card onto the battlefield, attach Elder Soulblade to it. If you searched you library this way, shuffle.
Equipped creature gets +3/+1 and has menace.
Equip {5}

First strike, lifelink
When this creature transforms into Eleanor, Kingslayer, exile up to one target creature. If that creature was legendary, put two +1/+1 counters on Eleanor.

Flash
When Eleanor, Royal Captain enters, target legendary creature gains indestructible until end of turn.
Cybersoul {4}{W/B}

Flash
Flying
When Electronegative Specialist enters the battlefield, choose a number. You and creatures you control gain protection from mana values equal to the chosen number until end of turn.

As long as Ella's Agent is attacking, it gets +2/+0 and has deathtouch.
{1}, Sacrifice a creature: Target creature you control gains indestructible until end of turn.

Whenever Emberwalker enters the battlefield or attacks, exile the top card of your library. You may play it until end of turn.
As long as you're ancient, you may play cards exiled with Emberwalker.

{1}, Exile a permanent card from your graveyard: Surveil 2.
{2}, Exile two permanent cards from your graveyard: Draw a card.
{5}, Exile five permanent cards from your graveyard: Exchange your hand and graveyard.

Exile the top four cards of your library. You may play them until you play a card not exiled this way.

Vigilance, reach
When Enduring Jentil enters the battlefield, create an artifact token named Menhir with “{2}, {T}, Exile a creature or land card from your graveyard: Draw a card. You gain 2 life.”
Whenever Enduring Jentil attacks, you may sacrifice an artifact. If you do, Enduring Jentil deals damage equal to its power to target creature.

Prowess, haste
When Enigmatic Mentor dies, create X 1/1 blue Wizard creature tokens with prowess and haste, where X is Enigmatic Mentor's power.

Ward {1}
Whenever one or more counters are put on Enlightened Naturalist, draw a card for each kind of counter put on it on it that it didn't have already.

Choose one. If your devotion to white is three or greater, you may choose another. The same is true for devotion to blue.
• Counter target spell.
• Target player draws a card.
• Target player gains 4 life.

Ephemeral Mire enters the battlefield tapped.
{T}: Add {U} or {B}.
{4}{U/B}: Until end of turn, Ephemeral Mire becomes a 3/2 black and blue Horror creature until end of turn and can't be blocked this turn. It's still a land. This ability costs {X} less to activate, where X is your devotion to black and blue. Activate only once each turn.

This spell costs {3} less to cast if you control three or more tokens.
Create X 1/1 green Elf creature tokens.

Enchant creature with another Aura attached to it
Enchanted creature gets +3/+3 and has trample, vigilance, and reach.