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 it's your turn, Elektes has first strike.
At the beginning of combat on your turn, target creature you control gets +X/+0 until end of turn, where X is your devotion to red and white.

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.

Flash
Prowess
When Ella enters the battlefield, create two 1/1 blue Wizard creature tokens with prowess.
Whenever you cast a noncreature spell, you may sacrifice a creature. If you do, copy that spell. You may choose new targets for the copy.

{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.

You gain 3 life, scry 2, then draw a card.

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.

Indestructible
As long as your devotion to white and blue is less than seven, Ephara isn't a creature.
Whenever you cast an enchantment spell, you draw a card and you gain 1 life.

When Escorted Captain enters or dies, create a 1/1 colorless Cyborg artifact creature token.

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

Double strike
Whenever you attack, mill two cards. For each of the milled cards, you may cast it, then if you don't, creatures you control get +1/+0 until end of turn.

Reach
{3}{R/G}: Flametip Goliath gets +2/+0, gains trample, and becomes a Giant in addition to its other types until end of turn.

Flash
At the beginning of your end step, if you control three or more untapped lands, put a +1/+1 counter on Flow Grandmaster.

Create a tapped colorless artifact token named Leyshard. It has “{T}, Sacrifice Leyshard: Add one mana of any type. Draw a card.”

This spell costs {1} less to cast for each Spirit you control.
Flying
Escape—{8}{W}{U}, Exile three other cards from your graveyard.

Vigilance, haste
Revolt — At the beginning of each end step, if a permanent you controlled left the battlefield this turn, put a +1/+1 counter on each creature you control.

Flash
Deathtouch
Whenever you cast a noncreature spell, return up to one target creature card from your graveyard to your hand.

Search your library for a noncreature, nonland card not named Get Your Wish, reveal it, put it into your hand, then shuffle.
You may cast a spell with mana value X or less from your hand without paying its mana cost, where X is the number of colors among permanents you control.

Whenever you cast an instant or sorcery spell, put a counter on Gi-Gecha, Tide of Victory from among flying, vigilance, trample, and +1/+1 that it doesn't have on it.
As long as Gi-Gecha has four or more counters on it, it has hexproof and is an artifact creature.
Crew 3

Enchant land
When Gift of Deadwoods enters the battlefield, mill three cards, then return a creature or land card milled this way to your hand.
At the beginning of combat on each player's turn, if you're ancient, you may have enchanted land become a 4/4 Elemental creature until end of turn. It's still a land.