msem-instigator

Enchant creature
Enchanted creature can't attack or block.

Target opponent reveals their hand. You choose a nonland card from it. That player exiles that card.
Each player conjures a card named Data-Point into their hand. (It's a sorcery that costs {2} with “Draw a card.”)

As Humble Abode enters, choose a creature or planeswalker type.
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast spells of the chosen type.

{3}{R}: Target creature can't block this turn.

Once each turn, when a creature card is put into your graveyard from anywhere, create a 1/1 blue and black Bird creature token with flying and “When this creature deals combat damage to a player, sacrifice it. If you do, draw a card.”
Whenever three or more creatures you control deal combat damage to a player, that player loses 1 life for each card in your hand.

Wanderlust — When you cast this spell, you may copy it if you control four or more differently named lands. You may choose new targets for the copy.
Untap target creature you control. It gets +1/+1 and gains hexproof and indestructible until end of turn.

When Datalith enters, conjure a card named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)
{T}: Add one mana of any color.

Tithe (When this creature enters, you may tap three other artifacts and/or creatures you control.)
When Vindictive Abbot enters, you may have target creature get -1/-1 until end of turn. If Vindictive Abbot's tithe was paid, destroy that creature.

Enchant creature
Enchanted creature gets +2/+2 and has trample and indestructible.

Your opponents can't gain life.
If a source you control would deal damage to an opponent, it deals that much damage plus 1 instead.
{3}{R}: Transform Pyromantic Duo. Activate only if it's attacking.

Proliferate (Choose any number of permanents and/or players with counters on them, then give each another counter of each kind already there.)
Scry 2, then draw a card.

Draw three cards. Then discard two cards unless you discard a card that has the same name as a permanent you control or a card in your graveyard.

Put target creature card from a graveyard onto the battlefield under your control. That creature is a black Zombie in addition to its other colors and types.
Zombiecycling {2}{B} ({2}{B}, Discard this card: Search your library for a Zombie card, reveal it, and put it into your hand, then shuffle.)

{T}: Add {C}.
Dominance — {1}, {T}: Blistering Boneyard deals 1 damage to each opponent. Activate only if you control the creature with the greatest power or tied for the greatest power.

Equipped creature gets +2/+2 and has haste and trample.
Whenever another creature you control dies, sacrifice equipped creature.
Equip {1}

When Lammasu Roost enters, create a 2/2 blue Lammasu creature token with flying.
{3}{U}: Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

{3}{U}, Exile a card from your graveyard: Omen Serpent can't be blocked this turn.

Each opponent sacrifices a creature, then loses 4 life. You return a creature card from your graveyard to your hand, then gain 4 life.

Target creature gets +2/+0 until end of turn and can't be blocked except by three or more creatures this turn.
Flashback {U/R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

You can't cast this spell if you've cast another spell this turn.
Add seven mana in any combination of colors. Spend this mana only to cast red spells with mana value 6 or greater without {X} in their mana cost.

Whenever you cast a black spell, put a +1/+1 counter on Flenser's Lieutenant.
{B}{B}: Return Flenser's Lieutenant from your graveyard to your hand.

Vigilance
Whenever the final chapter ability of a Saga you control resolves, you may return a non-Saga card at random from your graveyard to your hand.

Flash
Reach
Whenever Mattia enters or becomes tapped, put a +1/+1 counter on target creature you control.
{2}{G}, {T}: Target creature must be blocked this turn if able. Activate only as a sorcery.

Whenever a nontoken creature you control dies, you may exile it. If you do, create a token that's a copy of it except it is an enchantment. (It still has its abilities, but it's not a creature or other types.)