msem-instigator

Activated abilities of sources you don't control can't be activated unless they're mana abilities.

Anran's Realm enters tapped.
{T}: Add {R} or {G}.
{R}{G}, {T}: Create a Function token with “This spell can't be countered.” Activate only if you control a creature with power 4 or greater. (It's an enchantment. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)

Each land is an Island in addition to its other land types.

Whenever Apex of Augmentation attacks, other creatures you control can't be blocked this turn.

As Aquatic Refuge enters, you may tap an untapped creature you control. If you don't, Aquatic Refuge enters tapped.
{T}: Add {W} or {U}.

Arcane Oasis enters tapped unless you control another Desert.
{T}: Add {U} or {R}.

Arcane Sanctum enters tapped.
{T}: Add {W}, {U}, or {B}.

You have no maximum hand size.
{T}: Add {C}.
{1}, {T}: Add one mana of any color.

Flying, vigilance

Flying
Whenever Archon of Inspiration attacks, add three mana in any combination of colors at the beginning of your next main phase.

Flying, trample

Flying
{1}: Archon of Supremacy gets +1/-1 until end of turn.

Flying, menace

({T}: Add {W} or {B}.)
Whenever Arctic Mine becomes tapped, you lose 1 life unless you control two or more basic lands.

Arid Causeway enters tapped unless you control another Desert.
{T}: Add {R} or {W}.

[+1]: Tap up to one target creature. It doesn't untap during its controller's next untap step.
[–2]: Exile target card from a graveyard. Create a 2/2 blue and black Elemental creature token.
[–7]: You get an emblem with “You may play cards from exile.”

Whenever Arisen Helix attacks, scry 2.
If Arisen Helix would die, exile it instead.

Haste
Whenever Arisen Hunter attacks, target player loses 2 life and you gain 2 life.
If Arisen Hunter would die, exile it instead.

Whenever Arisen Rider attacks, creatures your opponents control get -1/-1 until end of turn.
If Arisen Rider or another creature or planeswalker would die, exile it instead.

Trample
Whenever Arisen Tyrant attacks, mill three cards, then you may exile a card from your graveyard. You may cast a copy of the exiled card without paying its mana cost if the spell's mana value is 3 or less.
If Arisen Tyrant would die, exile it instead.

Aristocrat's Gallery enters tapped.
When Aristocrat's Gallery enters, look at the top card of your library. You may put it into your graveyard.
{T}: Add {G} or {U}.

{T}: Add {C}.
Harmony — Add one mana of any color.
{1}, {T}: Harmonize. (Trigger up to one harmony of one permanent you control.)

{T}: Add one mana of any color. Each other player adds one mana of any color at the beginning of their next first main phase.

{T}: Add {C}.
{5}, {T}, Sacrifice Ascendant's Cell: You may activate loyalty abilities of planeswalkers you control twice this turn rather than only once.

{T}: Add {C}.
{T}: Add one mana of any color. Activate only if you control a transformed permanent.