msem-instigator

Majestic Tomb enters tapped.
{T}: Add {B} or {R}.
When Majestic Tomb enters, you may put a loyalty counter on a planeswalker you control.

Target creature gains haste until end of turn. Make an Entrance deals 2 damage to up to one target creature.

Search your library for an Equipment card, reveal it, put it into your hand, then shuffle. (Then exile this card. You may cast the creature later from exile.)

Enchant creature
Enchanted creature gets -X/-X, where X is 1 plus the number of counters on it.

Haste
Whenever Malformed Mongrel deals combat damage to a player, discard a card.

Enchant creature
Enchanted creature has first strike and trample.

{T}: Add one mana of any color.

When Mana Rose enters, you gain 2 life and scry 2.
{1}, {T}: Add one mana of any color.

Whenever you cast a spell from anywhere other than your hand, surveil 1.

{T}: Add {C}.
{T}, Pay 1 life: Add one mana of any color. Spend this mana only to cast a legendary spell or activate an ability of a legendary permanent.
{3}, {T}, Sacrifice Many-Voiced Tower: Search your library for a legendary card, reveal it, put it into your hand, then shuffle. Activate only if you control five or more differently named lands.

Enchant creature
Enchanted creature gets +1/+1.
When enchanted creature dies, return another target creature card from your graveyard to your hand.

Flying, lifelink
Your opponents can't search libraries.
{B}, Pay 2 life, Discard a card: Search your library for a card, then shuffle and put that card on top.

Improve {1}{W} ({1}{W}: Put a +1/+1 counter on this creature. This costs {1} more to activate for each +1/+1 counter on it. Improve only as a sorcery.)
Prevent all combat damage that would be dealt to attacking embattled creatures you control. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

{1}: Look at the top card of your library.
{T}, Sacrifice Marked Coin: You may shuffle your library. Draw a card.

{T}: Add {C}.
Tap five untapped Satrapies you control: Add six mana in any combination of colors.

Menace
When Marrow Raptor enters, you may sacrifice a land or exile a land card from your graveyard. If you do, put a +1/+1 counter on it.

Marrowskitter can't block and can't be blocked.
{3}{B}{B}: Return Marrowskitter from your graveyard to the battlefield. Create a token that's a copy of it.

Target creature gains hexproof until end of turn.
Create a colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”

Whenever Marshback Knights becomes the target of a spell or ability an opponent controls, counter it unless they pay {3}.
{1}{U}: Marshback Knights gains flying until end of turn.

Marshy Vista enters tapped.
{T}: Add {B} or {R}.
{1}, {T}: Add one mana of any color.

First strike
Whenever Martial Maestro attacks, other attacking creatures you control get +1/+0 until end of turn.

Target creature gets +1/+1 until end of turn. Then draw a card if that creature is a Warrior.

Trample
Whenever you cast a spell with more colors than the number of counters on Martoob Beastkeeper, put a +1/+1 counter on Martoob Beastkeeper.

Whenever an attacking creature your team controls dies, you gain 3 life.

{T}: Add {C}.
Whenever you tap Masamori Initiate for mana, you may mill a card.