msem-instigator

Menace (This creature can't be blocked except by two or more creatures.)
Whenever Weedy Whackers attacks, create a 1/1 green Insect creature token that's tapped and attacking.

Bleakrealm Moor enters tapped unless you played it from exile.
{T}: Add {B} or {R}.

Up to one target creature can't block this turn. (Then exile this card. You may play the land later from exile.)

{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 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 tapped unless you played it from exile.
{T}: Add {R} or {W}.

Creatures you control get +1/+0 until end of turn. (Then exile this card. You may play the land later from exile.)

{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 tapped unless you played it from exile.
{T}: Add {R} or {G}.

Up to one target creature you control has base power 4 until end of turn. (Then exile this card. You may play the land later from exile.)

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

Exile the top card of your library. You may cast it. (Then exile this card. You may play the land later from exile.)

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

Look at the top two cards of your library. Put one into your graveyard and the other back on top.

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

Put up to one target permanent card from your graveyard on top of your library. (Then exile this card. You may play the land later from exile.)

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

Exile up to one target creature you control until your next end step. (Then exile this card. You may play the land later from exile.)

{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, 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 tapped unless you played it from exile.
{T}: Add {G} or {U}.

Search your library for a land card, reveal it, then shuffle and put that card on top. (Then exile this card. You may play the land later from exile.)

{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.