msem-instigator

Creatures can't attack you or a planeswalker you control unless their controller pays {2} for each of those creatures.
Creatures can't block Ghastly Scraper unless their controller pays {2} for each of those creatures.

{2}, {T}: Prevent all combat damage that would be dealt to and dealt by target creature this turn.

{T}: Add {C}.
{T}, Sacrifice Ghost Quarter: Destroy target land. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle.

Ghost Sloop can't be blocked.
Crew 4 (Tap any number of creatures you control with total power 4 or greater: This Vehicle becomes an artifact creature until end of turn.)
Exile a creature card from your graveyard: Ghost Sloop becomes an artifact creature until end of turn.

({T}: Add {U} or {B}.)
Ghostspore Mire enters tapped.
{1}, {T}: Add {U}{U} or {B}{B}.

{2}, Sacrifice Giant's Remains: Draw a card.
{5}, Exile Giant's Remains from your graveyard: Create a tapped 4/4 black Skeleton Giant artifact creature token.

Giant's Temple enters tapped.
{T}: Add {G}.
{2}{G}, {T}: Target nonland permanent you control becomes a creature with power and toughness equal to its mana value until end of turn. (It loses all other types.)

{T}: Target player mills a card.
{2}, Sacrifice Gilded Cipher: Draw a card.

As you harmonize, you may choose another harmony ability to trigger. (They can't be the same harmony.)
Harmony — Scry 1.

Flying
When Gilded Guardian dies, you may search your library for a legendary card, reveal it, put it into your hand, then shuffle.

{T}: Add {C}.
{T}, Sacrifice Gilded Gulch: Add one mana of any color.
When you discard Gilded Gulch, you may pay {1}. If you do, create a tapped colorless land token named Fading Rift with “{T}, Sacrifice this land: Add one mana of any color.”

{3}, {T}: Tap target creature.

{3}, {T}: Look at the top five cards of your library. You may reveal a colorless card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

Flying
Whenever a player shuffles their library, Gilded Wyvern deals 2 damage to that player.

Equipped creature gets +2/+1.
Whenever equipped creature becomes untapped, you draw a card and you gain 2 life.
Equip {3}

As an additional cost to cast this spell, sacrifice a permanent.
Reveal the top card of each of your libraries. Put each permanent card revealed this way with mana value less than or equal to the sacrificed permanent's onto the battlefield.

Defender
When Glacial Buttress dies, tap each creature that dealt damage to it this turn. Those creatures don't untap during their controller's next untap step.

You may choose not to untap Glacial Shelf during your untap step.
{T}: Add {C}.
{4}, {T}: Tap target creature that's attacking you. It doesn't untap during its controller's untap step for as long as Glacial Shelf remains tapped.

Glacial Vista enters tapped.
{T}: Add {W} or {U}.
{1}, {T}: Add one mana of any color.

Gleaming Hot Springs enters tapped unless you control a Mountain.
{T}: Add {W} or {U}.

{T}, Pay 1 life: Add {U}.
{T}, Pay 1 life, Sacrifice Gleaming River: Search your library for an Island card, put it onto the battlefield tapped, then shuffle.

Gleaming Veldt enters tapped unless another player controls a land that could produce {G} or {W}.
{T}: Add {G} or {W}.

When Gleaming Waypoint enters, create a 1/1 red Scout creature token.
{T}: Add {U}, {R}, or {W}.

{3}, {T}: Glimmering Staff deals 1 damage to any target.
{5}, {T}: Put a -1/-1 counter on target creature.

At the beginning of your first main phase, choose one —
• Artifact spells cost {1} less to cast until your next turn.
• Nonartifact spells cost {1} more to cast until your next turn.