Search your library for a basic land card, reveal it, put it into your hand, then shuffle. If this spell's flashback cost was paid, instead search your library for any number of land cards, put them onto the battlefield tapped, then shuffle.
Flashback {3}{W}{U}{B}{R}{G}

[+1]: Up to one target creature you control dares 4 and gains vigilance until end of turn.
[–2]: Cathette deals 2 damage to any target and you gain 2 life. Target player creates two 1/1 white Warrior creature tokens.
[–6]: You get an emblem with “At the end of the first combat phase on each of your turns, untap each creature you control. After this phase, there is an additional combat phase.”

When D'Enzo Orsino enters the battlefield, you may search your library for a card named Marie Laurent, a card named Hans Nehmann and a card named Diago Maldovo, reveal them, put them into your hand, then shuffle.
Prevent all combat damage that would be dealt to legendary Allies you control.

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.

Elephant of the Golden Palace enters the battlefield with your choice of a lifelink counter or an indestructible counter on it if {W} was spent to cast it. The same is true for flying or hexproof and {U}, deathtouch or menace and {B}, haste or double strike and {R}, and vigilance or trample and {G}.

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

Flying
Once each turn, whenever you cast a black spell, you may pay 1 life. If you do, create a Treasure token.
{W}{U}{B}{R}{G}: Each opponent loses 4 life and you gain 4 life.

Glitch, Chaos Redeemed is all colors.
[+2]: Up to one target creature has base power and toughness 4/4 until your next turn.
[–3]: Create three 1/1 white Elemental Bird creature tokens with flying. Scry 3.
[–10]: Add {W}{W}{U}{U}{B}{B}{R}{R}{G}{G}. Draw ten cards.

Goletre, Perfected Form enters the battlefield with a lifelink counter, a +1/+1 counter, and a flying counter on it.
Whenever a creature you control attacks, choose a kind of counter on it. You may put a counter of that kind on target creature you control other than that creature.

Whenever you activate one of Hieronymus Scratch's loyalty abilities, return up to one card from your graveyard to your hand.
[+1]: You may sacrifice a creature. If you do, create a 5/5 black Demon creature token.
[–2]: You may pay 2 life. If you do, each opponent loses 5 life.
[–4]: You may sacrifice a land. If you do, you may cast a card from your hand without paying its mana cost.

Hyperloop Obelisk enters the battlefield tapped.
{T}: Add {U}, {B}, or {R}.
{VP}{VP}{VP}{VP}, Discard Hyperloop Obelisk: Untap target creature. It gets +4/+4 until end of turn.

Whenever Implacable Shrine-Guard attacks, for each color, do the following if your devotion to that color is three or greater.
{W} — Create a 1/1 white Human creature token.
{U} — Draw a card.
{B} — Each opponent loses 2 life.
{R} — Create a Treasure token.
{G} — You gain 3 life.

{3}{R}{R}, Exile Indulge the Fifth Encore from your hand: At the beginning of your next upkeep, you may cast Indulge the Fifth Encore from exile without paying its mana cost. Activate only as a sorcery.
Add {W}{U}{B}{R}{G}. Until end of turn, you don't lose this mana as steps and phases end.

Indestructible
As long as your devotion to red, white and black is less than nine, Karda isn't a creature.
Whenever you attack, creatures you control get +2/+1 until end of turn. At the end of combat, if Karda dealt combat damage to a player, sacrifice him, then search your library and/or graveyard for a card named Iroas, Honor-Bound and a card named Mogis, Rage-Crowned and put them onto the battlefield, then shuffle.

When Leyspark Wielder enters, if you cast it, add {G}{U}{R}. Spend this mana only to cast instant or sorcery spells.
Whenever you cast an instant or sorcery spell, target creature gets +1/+1 and gains trample and haste until end of turn.

Magdalena Bay enters the battlefield tapped.
{T}: Add {G}, {W}, or {U}.
{VP}{VP}{VP}{VP}, Discard Magdalena Bay: Target creature gets +3/+3 and gains menace until end of turn.

Nykthos, Architect of Gods has indestructible as long as you control at least three Shrines.
Whenever Nykthos attacks, you may pay {W}{U}{B}{R}{G}. If you do, search your library for a Shrine or legendary land card, put it onto the battlefield, then shuffle.

Create a 3/1 red Dinosaur creature token. When you do, pay for and choose any number.
+{G} — Put a trample counter on target creature you control.
+{U} — Put a +1/+1 counter on target creature you control.
+{R} — Put a haste counter on target creature you control.

Studio Excelsior enters the battlefield tapped.
{T}: Add {R}, {G}, or {W}.
{VP}{VP}{VP}{VP}, Discard Studio Excelsior: Target creature gets +2/+2 until end of turn and can't be blocked this turn.

Sunset Slums enters the battlefield tapped.
{T}: Add {W}, {U}, or {B}.
{VP}{VP}{VP}{VP}, Discard Sunset Slums: Target creature gets +3/+3 and gains trample until end of turn.

Draw a card. When you do, pay for and choose any number.
+{U} — Return target spell to its owner's hand. That player draws a card.
+{R} — Target player discards all the cards in their hand, then draws that many cards.
+{G} — Untap up to three target lands.

Lifelink
Indulgence
Whenever you indulge, you may gain control of target nonland permanent for as long as you control The Beauclaire Family.

Tree of Clues enters the battlefield tapped.
{T}: Add {B}, {R}, or {G}.
{VP}{VP}{VP}{VP}, Discard Tree of Clues: Target creature gets +3/+3 and gains flying until end of turn.

Whenever Witchfinder Artur enters the battlefield or attacks, each opponent mills two cards and loses 2 life.
Whenever you cast an instant or sorcery spell, you may exile target instant or sorcery card with mana value less than that spell's mana value from an opponent's graveyard. If you do, cast a copy of the exiled card without paying its mana cost.

At the beginning of each opponent's upkeep, untap up to one permanent you control. You may cast spells as though they had flash until end of turn.
[+2]: Surveil 1, then draw a card.
[–3]: Choose a nonland, non-Xirix card name. Exile all permanents with that name.
[–9]: Shuffle any number of cards from your graveyard into your library. Xirix deals that much damage to any non-Xirix target, and you gain that much life.