msem-instigator

{T}: Add {C}.
{1}, {T}: Add one mana of any color. When that mana is spent to cast an Adventure spell, scry 1.

You may have Crossroads Town enter the battlefield tapped. If you do, search your library for a basic land card, reveal it, then shuffle and put that card on top.
{T}: Add {C}.

Dawn Hill Outskirts enters the battlefield tapped unless you played it from exile.
{T}: Add {R} or {W}.

{T}: Add {C}.
{4}, {T}, Sacrifice Eon Campfire: Destroy target artifact or nonbasic land.

{T}: Add {C}.
{1}, {T}, Exile Exotic Isle: Search target opponent's library for a land card and put it onto the battlefield tapped under your control, then that player shuffles. Activate only as a sorcery.

{T}, Sacrifice Fabled Passage: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Then if you control four or more lands, untap that land.

Fang Den Jaws enters the battlefield tapped unless you played it from exile.
{T}: Add {R} or {G}.

Flamingo Rock enters the battlefield tapped unless you played it from exile.
{T}: Add {U} or {R}.

Frondpond Grotto enters the battlefield tapped unless you played it from exile.
{T}: Add {U} or {B}.

Gloomhollow Woodlock enters the battlefield tapped unless you played it from exile.
{T}: Add {B} or {G}.

Highpoint Shrine enters the battlefield tapped unless you played it from exile.
{T}: Add {W} or {U}.

{T}: Add {C}.
{1}: Hoof Cliff Horngrove becomes a 2/2 Elemental creature until end of turn. It's still a land.
Menagerie — Whenever Hoof Cliff Horngrove becomes a creature, it gains your choice of +1/+1, flying, first strike, lifelink, trample, or haste until end of turn. This ability triggers only if there are five or more creature types among creatures you control.

As Humble Abode enters the battlefield, choose a creature or planeswalker type.
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast spells of the chosen type.

Northrime Aurora enters the battlefield tapped unless you played it from exile.
{T}: Add {G} or {U}.

{T}: Add {C}.
{2}, {T}, Sacrifice Rugged Expanse: Put a +1/+1 counter on target creature. It gains vigilance until end of turn. Activate only as a sorcery.

Slipsand Oasis enters the battlefield tapped unless you played it from exile.
{T}: Add {W} or {B}.

Tinyvale Treetops enters the battlefield tapped unless you played it from exile.
{T}: Add {G} or {W}.