msem-instigator

Search your library for two cards and your graveyard for two cards, each with different names, and reveal them. An opponent exiles two of those cards. Put the rest into your hand. Then shuffle.
Exile Words Unspoken.

Harmony — Draw a card.
When Enthralling Actor enters, harmonize. (Trigger up to one harmony of one permanent you control.)

As long as it's your turn, equipped creature has first strike and deathtouch.
If equipped creature would deal damage to a player or planeswalker, it deals four times that damage to that player or planeswalker instead.
Equip {4}

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

When Atlas of Worlds enters, search your library for any number of land cards with different names and exile them, then shuffle.
You may play lands exiled with Atlas of Worlds.

Whenever Queensguard attacks, another target attacking Knight or Soldier gains indestructible until end of turn.

Target creature you control fights another target creature.
Inscribe {3}{G} ({3}{G}: Exile this card from your hand inscribed on a creature you control. Whenever that creature attacks, its controller may cast a copy of the inscribed card without paying its mana cost. Inscribe only as a sorcery.)

{3}{B}{B}: Return target Zombie creature card from your graveyard to the battlefield.
Whenever another creature you control enters from a graveyard or you revive a creature token, that creature gets +2/+0 and gains haste and menace until end of turn.

Reach

{T}: Add {C}.
{T}, Pay 1 life: Add one mana of any color.

Lifelink
Whenever a creature with power less than Kiri, Cloudwalker's power you control enters, you may pay {W}. If you do, you gain 2 life and draw a card.

Target creature gets +1/+0 and gains first strike until end of turn.
Monument {4}{R} (You may cast this transformed from your graveyard for its monument cost. Exile it if it would leave the battlefield or not resolve.)

If a source would deal damage to a creature this turn, prevent all but 1 of that damage.

When Shadowlurk enters, if a creature died this turn, put a +1/+1 counter on it.

Choose X. Target player reveals their hand and discards all nonland cards with mana value X.

Assault {G} (Whenever this attacks, if it has no +1/+1 counters on it, you may pay its assault cost to put a +1/+1 counter on it.)
Whenever a creature you control assaults, it gains indestructible until end of turn.

Whenever you cast a spell during an opponent's turn, put a +1/+1 counter on Entelan Duelist.
{2}{U}{R}, Remove two +1/+1 counters from Entelan Duelist: Copy target instant or sorcery spell you control. You may choose new targets for the copy.

Target creature gets -3/-3 until end of turn. Scry 2.

Improve {R} ({R}: Put a +1/+1 counter on this creature. This costs {1} more to activate for each +1/+1 counter on it. Improve only as a sorcery.)
Whenever another creature you control with power less than or equal to Folkvar, Galdurheim Brawler's power attacks, Folkvar deals 1 damage to the player or planeswalker that creature is attacking and you gain 1 life.

Dreamscape enters tapped with two charge counters on it.
{T}: Add {C}.
{T}, Remove a charge counter from Dreamscape: Add one mana of any color.

{W}: Parish Custodian gains lifelink until end of turn. (Damage dealt by this creature also causes you to gain that much life.)

Once each turn, when Eruq, the Flamebearer enters or you attack with one or more Horrors, you may have Eruq deal 2 damage to each opponent. Then if Eruq isn't a token, gain control of target creature an opponent controls until end of turn. Tap it. It's attacking its controller.
{2}{R}{R}, Discard Eruq: Create a token that's a copy of Eruq, the Flamebearer, except it's 4/4 and isn't legendary. Activate only as a sorcery.

Flying, deathtouch
Whenever Queen of the Hive deals combat damage to a player, create a 1/1 green Insect creature token for each Insect you control.

Search your library for a land card, reveal it, put it into your hand, then shuffle.

Target opponent reveals their hand. You choose a creature card from it. That player discards that card.