msem-instigator

Batrest, Fellor Leader gets +1/+1 for each Equipment attached to it.
When Batrest enters the battlefield, create Astrina, Forged for Glory, a legendary colorless Equipment artifact token with “Equipped creature gets +4/+4 and has first strike and lifelink” and equip {4}. Attach it to Batrest.

When Batrest's Forgemaster enters the battlefield, you may search your library for an Equipment card, reveal it, put it into your hand, then shuffle.
Whenever Batrest's Forgemaster attacks, Equipment spells you cast this turn cost {2} less to cast.

Whenever Beragnian Brawlmaster or another Warrior enters the battlefield under your control, that Warrior fights target creature an opponent controls.
{R}{W}: Target Warrior creature gets +1/+1 until end of turn.

Exile up to three instant or sorcery cards from your graveyard. You may cast a copy of each card exiled this way without paying its mana cost.

You may play lands from your graveyard.
{B}{G}, Sacrifice three lands: Return Endrison Nourisher from your graveyard to your hand.

When Fellor Ironborn enters the battlefield, you may return target artifact card from your graveyard to the battlefield. If it's an Equipment, you may attach it to target creature you control.

As an additional cost to cast this spell, exile a creature card from your graveyard.

Search your library for a creature or planeswalker card, reveal it, put it into your hand, then shuffle.

Whenever a creature attacks, if its toughness is greater than its power, untap it.

You may have Graveborn Usurper enter the battlefield as a copy of any creature card in a graveyard, except it has “{2}{U}{B}, Exile a creature card from a graveyard: Graveborn Usurper becomes a copy of the exiled card, except it has this ability.”

Other untapped creatures you control have indestructible.
{2}{G}{W}: Target creature gains vigilance until end of turn.

Instant and sorcery spells you cast cost {1} less to cast.
Reprise and reverberate costs you activate cost up to {1} less.
Exile an instant or sorcery card from your graveyard: Add {U} or {R}. Spend this mana only to cast an instant or sorcery spell. Activate only once each turn.

When Landbound Ritualist enters the battlefield, you may put a land card from your hand or graveyard onto the battlefield tapped.

At the beginning of your upkeep, if five or more instant and/or sorcery cards are in your graveyard, return target instant or sorcery card at random from your graveyard to your hand.

Whenever Mawdryk, Endrison Warden or another nontoken Elf creature enters the battlefield under your control, create a 1/1 green Elf Druid creature token.
{B}{G}, Sacrifice two Elves: Destroy target non-Elf creature.

When Mulchborn Behemoth enters the battlefield, you may sacrifice any number of lands.
Mulchborn Behemoth gets +1/+1 for each land card in your graveyard.
{B}{G}, Sacrifice a land: Destroy target creature or land.

Each creature you control assigns combat damage equal to its toughness rather than its power.
Whenever another creature enters the battlefield under your control, creatures you control get +0/+1 until end of turn.

Vigilance
Whenever Purgeward Adept blocks or becomes blocked, it gets +1/+0 until end of turn.

Whenever a card is put into your graveyard from your library, you may put it on top of your library.
{U}{B}, Sacrifice Rallios' Return: Until end of turn, you may play target card from your graveyard. If that spell would be put into a graveyard, exile it instead.

When Rise from Death enters the battlefield, exile all cards from your library. When Rise from Death is no longer on the battlefield, shuffle your graveyard into your library.
If you would draw a card, instead return a card from your graveyard to your hand. If you can't, you lose the game.
If a card would be put into your graveyard from anywhere, exile it instead.

Each instant and sorcery card in your graveyard has reprise. The reprise cost is equal to its mana cost. (As you cast an instant or sorcery spell, you may exile one card with reprise from your graveyard and pay its reprise cost. If you do, add its effects to that spell.)
Reprising spells you control can't be countered.

{1}{U}{B}, Exile a creature card from your graveyard: Vestige of Evil has base power and toughness equal to the exiled creature's power and toughness until end of turn.

You may play an additional land on each of your turns.
{1}{B}{G}, Sacrifice a land: Draw a card.

Flying, prowess
{U}{R}, Exile an instant or sorcery card from your graveyard: Whimsical Elemental gets +1/+1 until end of turn.

Vanishing 4 (This permanent enters the battlefield with four time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
Equipped creature gets +3/+3.
Equip {2}