msem-instigator

Sacrifice Scrapyard Raiders: Target artifact gains indestructible until end of turn.

Whenever you cast a spell, Scorned Figurant gets +1/+1 until end of turn.

Mill four cards, then return a noncreature card from your graveyard to your hand.

Enchant creature
Enchanted creature gets +2/+1 and is a black Zombie in addition to its other colors and types.

Codex — Leyran Alpha; Fungal Whomper; Plated Crusher; Towering Hydraffe; The Terror of Shady Cove. (As this enters, conjure its contents into a shuffled face-up additional library.)
When Mother of Monsters enters, you gain 6 life.
When Mother of Monsters dies, draw a card.

Flying
Whenever Spellgorger Elemental attacks, discard a card at random. If an instant or sorcery card is discarded this way, Spellgorger Elemental deals 3 damage to any target. Otherwise, draw a card.

Vigilance
{T}: Target instant or sorcery card in your graveyard with mana value 3 or less gains flashback {0} until end of turn. Activate only as a sorcery. (You may cast that card from your graveyard for its flashback cost. Then exile it.)

When Reverence Seeker dies, you may return another target Knight card from your graveyard to your hand.

At the beginning of each player's draw step, that player draws an additional card.
Spells cost {1} less to cast.
Players may spend mana as though it were mana of any color.

Bulwark — Whenever Soulstone Servant attacks, if you control a creature with toughness 4 or greater, Soulstone Servant gets +2/+2 and gains flying until end of turn.

For each creature target player controls, that player flips a coin. If the coin comes up tails, that player shuffles that creature into its owner's library.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)
I, II, III — Create a tapped colorless Powercell artifact token with “{T}: Add {C}.”
IV — Sacrifice three artifacts.
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As Fortified Village enters, you may reveal a Forest or Plains card from your hand. If you don't, Fortified Village enters tapped.
{T}: Add {G} or {W}.

Whenever Sentry of Kollis Gate is dealt damage, put a +1/+1 counter on each other creature you control.

Distorted (This creature can be blocked by tapped creatures but not untapped creatures.)
{2}{B}, Sacrifice Sluiceway Shrieker: Put the bottom card of your library into your hand.

Create three 2/2 white Cat creature tokens.
Fuse (You may cast one or both halves of this card from your hand.)

When Chimera Graft dies, manifest the bottom card of your library. (To manifest a card, put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)

Experience (Whenever this creature attacks, if it has fewer than three +1/+1 counters on it, put a +1/+1 counter on it.)

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever you cast your second spell each turn, add a quest counter.
1 — Exile the top card of your library. You may play that card until the end of your next turn.
2 — The second spell you cast during your next turn cost {1} less to cast.
3 — You may cast target instant or sorcery card from your graveyard this turn. When you do, copy it. You may choose new targets for the copy.

Survivors you control have flying.

Whenever Essence Carver blocks or becomes blocked by a creature with toughness 4 or greater, Essence Carver gets +2/+2 until end of turn.

Hexproof
Whenever an opponent casts a noncreature spell, put a +1/+1 counter on Spellbane Vulpine.

Trample
When Dreaded of Sahra enters, creatures you control become 8/8 Demons in addition to their other types until end of turn.

When Into the Unknown enters, create two 1/1 Scout creature tokens that are all colors.
Whenever a land you control enters, if it doesn't have the same name as another land you control, put a +1/+1 counter on each creature you control.

As Angelic Barracks enters, you may pay 3 life. If you don't, it enters tapped.
{T}: Add {U}, {R}, or {W}.