msem-instigator

When Blackwall Ramparts enters the battlefield, exile up to two target nonland permanents you don't control with total mana value 8 or less until Blackwall Ramparts leaves the battlefield.
Whenever you draw a card, you gain 1 life.

When Blackwall's Edge enters the battlefield, if you control four or more lands, you may have each player conjure a card named Data-Point into their hand. (It's a sorcery that costs {2} with “Draw a card.”)
{T}: Add {C}.
When Blackwall's Edge is destroyed, return it to its owner's hand.

Blade of the Many can be attached only to a nonlegendary creature.
Equipped creature gets +2/+2.
Each other creature you own is a copy of equipped creature.
Effects that would cause permanents you own to become creatures cause them to become copies of equipped creature instead.
Equip {6}

Enchant land
Whenever enchanted land is tapped for mana, its controller adds two mana in any combination of colors (in addition to the mana the land produces.)

Enchant creature
Enchanted creature gets +2/+2.
When enchanted creature dies, return it to the battlefield under its owner's control.

Enchant creature (Target a creature as you cast this. This card enters the battlefield attached to that creature.)
Enchanted creature gets +1/+3.
Whenever enchanted creature attacks, you gain 1 life.

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.)
This permanent gets +2/+2 for each card and token merged with it.

Whenever one or more creatures an opponent controls attack you or a planeswalker you control, that player gets a poison counter.

Enchant creature
Enchanted creature gets +3/+3 and has “{G}: Regenerate this creature.”

At the beginning of your upkeep, create two 1/1 colorless Construct artifact creature tokens, then you gain life equal to the number of artifacts and enchantments you control.

Enchant land (Target a land as you cast this. This card enters the battlefield attached to that land.)
Enchanted land has “{T}: Add one mana of any color” and “At the beginning of each upkeep, untap this land.”

When Blessing of Roya enters the battlefield or whenever you cast a spell from a graveyard, you gain 5 life and you mill five cards. Then you may put a card from your graveyard on the bottom of your library.

Whenever you cast an instant or sorcery spell from exile, copy it. You may choose new targets for the copy.

Whenever one or more creatures attack you, you may put a -1/-1 counter on target creature.

Breach (Whenever this deals combat damage to a player, you may have it become an Aura Curse until your next turn. Attach it to that player.)
At the beginning of your end step, each cursed opponent loses 2 life unless they discard a card.

Enchant creature
Enchanted creature gets +1/+1 and has hexproof.

Whenever an attacking creature you or a teammate controls dies, you lose 1 life and draw a card.

At the beginning of each end step, if an opponent lost life this turn, you may put a +1/+1 counter on target creature.
Sacrifice a creature, Sacrifice Blood Cult Covenant: Blood Cult Covenant deals damage equal to the sacrificed creature's power to any target.

Nonbasic lands have “Whenever this land becomes tapped, you lose 1 life unless you sacrifice this land.”

At the beginning of your upkeep, each player sacrifices a nonbasic land.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I — Each opponent discards a card and loses 2 life.
II — Exile target card from a graveyard. If a creature card was exiled this way, you gain 2 life.
III — At the beginning of the next end step, you gain 3 life if an opponent lost life this turn and each opponent loses 3 life if you've gained life this turn.

Chronicle (As this enters and after your draw step, add a lore counter. Stop after III.) [2/3]
[Lore I-II] Target creature you control gets +1/+0 until end of turn.
[Lore III] Target creature you control gets +2/+0 until end of turn.

Enchant creature
When Bloodbriar Blessing enters the battlefield, draw a card.
Enchanted creature gets +2/+2 and has menace.

Equipped creature gets +1/+1 and has lifelink.
Whenever equipped creature dies, if it wasn't a token, you may pay {3}. If you do, create a token that's a copy of that creature and attach Bloodguard's Hand to it.
Equip {3}

Enchant land
Enchanted land has “{T}: Each opponent loses 2 life.”