msem-instigator

Create a 1/1 blue Illusion creature token with “This gets +1/+1 for each other Illusion you control.”
Acquiesce (If you cast this spell from your hand, exile it as it resolves. When one or more creatures you control deal combat damage to an opponent, you may cast this card from exile without paying its mana cost.)

Players play with the top card of their libraries revealed.
[+2]: Target player mills a card. Draw a card.
[+1]: Create a 1/1 blue Illusion creature token with “This gets +1/+1 for each other Illusion you control.”
[–4]: Return target creature card from a graveyard to the battlefield under your control. It's an Illusion in addition to its other types.

Put target creature into its owner's library third from the top.

Cast this spell only during the declare blockers step.
After this step there's an additional declare attackers step followed by an additional declare blockers step. (A creature can't attack or block again if it's already attacking or blocking.)
Draw a card.

Menace
At the beginning of your upkeep, if an opponent has more cards in hand than you, you draw a card and you lose 1 life.

Defender
When Mnemonic Wall enters the battlefield, you may return target instant or sorcery card from your graveyard to your hand.

Other creatures you control get +2/+2.

Gestalt (When this or another creature enters under your control, you may merge it with the one in play, keeping counters and attachments. They become the permanent on top plus all abilities from under it.)
Double strike
If this creature would deal noncombat damage, it deals double that damage instead.

Target creature gets +1/+1 until end of turn.
Fabled {2}{R/W}{R/W} (Then if you cast this for its fabled cost, put it onto the battlefield transformed attached to that creature.)

Cast this spell only during your turn.
Counter target spell.

Flying

({T}: Add {B}.)
Moon of the Encroaching Night enters the battlefield tapped.
{1}{B}, {T}: Scry 1. (To scry 1, look at the top card of your library. You may put that card on the bottom of your library.)

({T}: Add {W}.)
Moon of the Final Dawn enters the battlefield tapped.
{1}{W}, {T}: Scry 1. (To scry 1, look at the top card of your library. You may put that card on the bottom of your library.)

({T}: Add {U}.)
Moon of the Frozen Dusk enters the battlefield tapped.
{1}{U}, {T}: Scry 1. (To scry 1, look at the top card of your library. You may put that card on the bottom of your library.)

({T}: Add {R}.)
Moon of the Lingering Day enters the battlefield tapped.
{1}{R}, {T}: Scry 1. (To scry 1, look at the top card of your library. You may put that card on the bottom of your library.)

({T}: Add {G}.)
Moon of the Promised Day enters the battlefield tapped.
{1}{G}, {T}: Scry 1. (To scry 1, look at the top card of your library. You may put that card on the bottom of your library.)

Flash
Whenever Moonlit Hunter enters the battlefield or you cast a noncreature spell, tap target permanent and untap a second target permanent.

Whenever a creature enters the battlefield under your control, you gain 1 life.
{2}{U}: Return target creature you control to its owner's hand.

Untap target creature. Prevent all damage that would be dealt to that creature this turn. Scry 1. (To scry 1, look at the top card of your library. You may put that card on the bottom of your library.)

When Morose Bohemian enters the battlefield, scry 1, then draw a card.

Choose one —
• Destroy target artifact or enchantment.
• Search your library for up to two basic land cards, reveal them, put them into your hand, then shuffle.

Mortal Realms enters the battlefield tapped unless you control two or more other lands.
{T}: Add {R}.
{T}, Pay 1 life: Add {B} or {G}.

When Moth-Heart Husk dies, create a 1/1 black Spirit creature token with flying.
Revive {3}{B} ({3}{B}, Exile this card from your graveyard: Create a token that's a copy of this card, except it has no mana cost. Activate this ability only any time you could cast a sorcery.)

Return target nonland permanent card with mana value 2 or less from your graveyard to the battlefield.
Acquiesce (If you cast this spell from your hand, exile it as it resolves. When one or more creatures you control deal combat damage to an opponent, you may cast this card from exile without paying its mana cost.)

Vanishing 3 (This permanent enters the battlefield with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
Whenever a creature dies or a time counter is removed from Mourn the Lost, you may tap target creature.