When Attuned District enters, scry 2.
Whenever you scry, you may pay {1}. If you do, create a 0/0 colorless Construct artifact creature token, then put X +1/+1 counters on it, where X is the number of cards you looked at.

Exile target creature.
Scry 1.

Return target creature card with mana value 4 or less from your graveyard to the battlefield. It gets +2/+1 and gains trample and haste until end of turn. Sacrifice it at the beginning of the next end step.

When Prismatic Remnant enters, scry 2.

Flash
Whenever you cast a noncreature spell, Prismatic Pack gets +1/+1 until end of turn. Untap it.

Once during each of your turns, you may cast a multicolored spell or a spell with {VP} in its mana cost from your graveyard. When you cast a spell this way, it gains “If this card would be put into a graveyard from anywhere, exile it instead.”

Moresso, Infuser of Light is all colors.
Hexproof from monocolored
Whenever you cast a spell with four or more mana symbols in its mana cost, add four mana of different colors. This ability triggers only once each turn.

Target player exiles two permanents they control with different mana values.

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.

Flying

Indestructible
As long as your devotion to blue and black is less than seven, Phenax isn't a creature.
At the beginning of each end step, each opponent mills X cards, where X is the number of cards put into their graveyard from anywhere this turn. You gain life equal to the number of cards milled this way.

Whenever Phenax or another Rogue you control deals damage to a player or planeswalker, each player mills two cards.
{1}{U}{B}, Exile five other cards from your graveyard: Return Phenax from your graveyard to the battlefield transformed. Activate only as a sorcery.

Enchant land
Enchanted land has “{T}: Add {G}{G}.”

Reach
Whenever Star-Studded Sagittaur deals combat damage to a player, you may bless target land.

Flash
When Omen of Slaughter enters, each opponent sacrifices a creature or planeswalker.
{2}{B}, Sacrifice Omen of Slaughter: Scry 2.

Flash
Lifelink
When Nikon, Skophos Protector enters, the next time a source of your choice would deal damage to you or a permanent you control this turn, prevent that damage. If damage is prevented this way, Nikon deals that much damage to that source's controller.

Enchant creature
Enchanted creature has “Whenever this creature deals combat damage to a player or planeswalker, scry 1, then draw a card.”

Vigilance
Whenever you attack, bless target creature.

Flash
When Agent of Deception enters, counter target creature or planeswalker spell unless its controller pays {X}, where X is your devotion to blue.

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, draw a card.

{1}, {T}: Add X mana is any combination of colors, where X is the number of Shrines you control.

Enchant creature
Enchanted creature gets -X/-X, where X is your devotion to black.

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.

Koios, Spear of Karda enters with a number of additional loyalty counters on him equal to your devotion to red.
[+1]: Exile the top three cards of your library. You may cast one of them.
[–3]: Koios deals damage to any nonplayer target equal to your devotion to red.
[–X]: Choose up to X target creatures with total mana value X or less. For each creature chosen this way, create a token that's a copy of it, except it has haste. Sacrifice those tokens at the beginning of the next end step.

Titan's Stairs enters tapped.
{T}: Add {R} or {W}.
{3}{R/W}: Titan's Stairs becomes a 2/2 red and white Archon creature with flying until end of turn. It's still a land. This ability costs {X} less to activated, where X is your devotion to red and white. Activate only once each turn.