msem-instigator

{2}{G}: Rotted Kalak gains indestructible until end of turn.
Revive {3}{B} ({3}{B}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

As an additional cost to cast Deepmire Abomination, reappropriate or pay {2}. (To reappropriate, exile exactly two cards from your hand and/or graveyard.)
Menace

{T}: Scry 1.

Archive 4 (As this enters, shuffle the top four cards of your main library into a new face up library. Sacrifice this after the archived library is empty.)
{1}, Sacrifice a permanent: Put a permanent card with a mana value less than the sacrificed permanent's from the archived library onto the battlefield. Activate only as a sorcery.

Put target permanent on top of its owner's library.

When Undead Banneret enters, if you control a legendary creature, each opponent loses 4 life.

Crystal Garden enters tapped.
{T}: Add one mana of any color. You can't spend this mana to cast a creature spell.

By Blood and Fire deals 3 damage to any target. Up to one target creature seeks valor. (Give it that Oath Aura. Fulfill it by it dealing combat damage to a player to create a 2/1 white Soldier token.)

Deathtouch, menace
Slayer of the Famed must be blocked each combat if able.

Deathtouch, hexproof from non-Adventure
Whenever a creature dealt combat damage by a creature you controlled this turn dies, draw a card.

When Kingpin of Nizev enters, create two 1/1 white Soldier creature tokens.
Sacrifice a creature: Each opponent loses 1 life. Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Cloudcover Heights enters tapped unless you control a Forest.
{T}: Add {R} or {W}.

Indestructible
Whenever this creature enters or transforms into Mahara, recruit. (Create a 0/0 white Soldier Army creature token, then put a +1/+1 counter on each Army you control.)
At the beginning of your end step, if you control four or more creatures, transform Mahara.

{T}: Add {W} or {B}.
{W}{B}, {T}: Each opponent loses 1 life and you gain 1 life.

(As you complete a condition, decode it. After all are decoded, you solve the mystery and transform this.)
When Mystery of the Crashed Craft enters, create two 1/1 red Alien creature tokens with “This creature can't block.”
{MG}—You cast an instant spell.
{MG}—You cast a sorcery spell.

Scry 3. (To scry 3, look at the top three cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Target opponent sacrifices a creature. Create an X/X black Zombie creature token, where X is the sacrificed creature's power.

{T}: Add {C}.
{1}, {T}, Sacrifice War-Torn Tundra: Arm target creature you control. Activate only as a sorcery. (Create a colorless Equipment artifact token with “Equipped creature gets +1/+0” and equip {2}, then attach it to that creature.)

Lifelink
Revelation spells you cast cost {1} less to cast.

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

Return up to two target creature cards from your graveyard to your hand. You lose 2 life.

{1}{U}: Aeon's Hand Cutthroat can't be blocked this turn.

Equipped creature gets +1/+1 for each Equipment attached to it.
Whenever an Equipment you control enters, attach it to equipped creature.
Equip {2}

Search your library for a basic land card and a Desert card, put them onto the battlefield tapped, then shuffle.