Nimbus of Thought enters tapped.
{T}: Add {U} or {R}.
{4}{U/R}: Until end of turn, Nimbus of Thought becomes a 3/3 blue and red Elemental creature with “Whenever this creature becomes tapped, you may discard a card. If you do, draw a card.” It's still a land. This ability costs {X} less to activate, where X is your devotion to blue and red. Activate only once each turn.

Your maximum hand size is zero.
Pay 1 life: Draw a card. Activate only as a sorcery.

Open Air Boardwalk enters tapped.
{T}: Add {G} or {W}.
{4}: Make a pledge. Activate only as a sorcery.

Ozzen Headquarters enters tapped.
{T}: Add {W} or {B}.
{T}, Discard another card named Ozzen Headquarters: Draw a card.

Penrath District enters tapped unless you control a Mountain, a Forest, and a Plains.
{T}: Add {R}, {G}, or {W}.

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.

Pool of Light enters tapped unless you control a basic Plains or a basic Island.

Possibility Heights enters tapped.
{T}: Add {R} or {G}.
{T}, Discard another card named Possibility Heights: Draw a card.

Pristine Grounds enters tapped unless you control no other lands.
{T}: Add one mana of any type Pristine Grounds hasn't produced this game.

Whenever you cast a spell, you may pay {X}, where X is that spell's mana value. If you do, copy it. You may choose new targets for the copy. Do this only once each turn.

{T}: Add {C}.
Whenever you amp it up, untap Pulsing Soundsea.

Quantum Skycity enters tapped.
{T}: Add {W} or {U}.
{T}, Discard another card named Quantum Skycity: Draw a card.

Rapturous Festival enters tapped.
{T}: Add {G} or {W}.
{T}, Discard another card named Rapturous Festival: Draw a card.

Rattling Soundvein enters tapped.
When Rattling Soundvein enters, you may pay 1 life. If you do, add one mana of any color other than red.
{T}: Add {R}.

Whenever Reborn Apostle attacks, each player loses 1 life.

Lifelink
When this creature transforms into Reborn Follower, put a +1/+1 counter on target creature.

Whenever this creatures transforms into Reborn Herald or another permanent you control transforms, create a 1/1 colorless Cyborg artifact creature token.
Reborn Herald gets +1/+1 for each other artifact you control.

{T}, Sacrifice Redeveloped Cityscape, Exile a card from your hand: Search your library for two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

{T}: Add {C}.
Whenever Resting Place attacks, sacrifice it at end of combat.
Spellcharge 5

{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast legendary spells or activate abilities of legendary permanents.
{3}, {T}, Sacrifice Revolutionary's Retreat: You may return target legendary card from your graveyard to your hand.

Secluded Hangar enters tapped unless you control a basic non-Forest land.
{T}: Add {G}.
{2}, {T}: Put a +1/+1 counter on target creature that entered this turn.

Shell Cove enters tapped.
{T}: Add {G} or {U}.
{9}{G/U}: Shell Cove becomes a 7/7 green and blue Leviathan creature with ward {3} until end of turn. It's still a land. This ability costs {X} less to activate, where X is your devotion to green and blue. Activate only once each turn.

Sillaman District enters tapped unless you control a Forest, a Plains, and an Island.
{T}: Add {G}, {W}, or {U}.

Double strike