msem-instigator

Creatures you control get +1/+1 and gain first strike until end of turn.

First strike

Target player sacrifices an attacking or blocking creature. Prevent all damage that would be dealt by creatures this turn.

Enchant creature
Enchanted creature can't be blocked.
{1}{R}: Enchanted creature gets +1/+0 until end of turn.

Anran's Realm enters tapped.
{T}: Add {R} or {G}.
{R}{G}, {T}: Create a Function token with “This spell can't be countered.” Activate only if you control a creature with power 4 or greater. (It's an enchantment. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)

{1}{B}: Blightcaller Shaman gains deathtouch until end of turn.

Spectral Salvo deals 13 damage to target tapped creature. Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Divine in Blood deals 2 damage to target player, then that player draws four cards.

Engage (This creature must be blocked each combat if able.)
Whenever Death Pits Gladiator perseveres, profit. (A creature perseveres when it survives damage. To profit, create a colorless Gold artifact token with “Sacrifice this artifact: Add one mana of any color.”)

[+2]: Up to one target creature gets +3/+1 until your next turn. Up to one target creature gets -3/-1 until your next turn.
[–2]: Up to two other target permanents you control become a copy of another target permanent until your next turn.
[–8]: Exchange your library and hand, then shuffle.

Equipped creature gets +1/+1.
At the beginning of combat on your turn, choose flying, first strike, vigilance, trample, or haste. Equipped creature gains that ability until end of turn.
Equip {2}

Flash
When Cephalovorous Flukes enters, counter target spell or ability that targets you or a permanent you control.

Tap an untapped Human you control: Dignitary's Rickshaw becomes an artifact creature until end of turn.
Inspired — Whenever Dignitary's Rickshaw becomes untapped, create a 2/1 red and white Fox creature token. It gains haste. Sacrifice the token at the beginning of the next end step.

Flying
Whenever Souls of the Jury enters or an opponent fails a trial, create a 1/1 white Cleric creature token.

First strike
At the beginning of your end step, each opponent that lost life this turn loses 1 life and discards a card. You gain life equal to the life lost this way, then draw a card for each land card discarded this way.

Sacrifice a creature: Put a +1/+1 counter on Blightroot.
Sacrifice a land: Blightroot gains indestructible until end of turn.

Guide to the Wayward enters with a +1/+1 counter on it.
{1}{W/U}, {T}: Permutate. (You may remove a counter from a creature you control. If you do, put two +1/+1 counters on a different creature you control.)

Whenever a creature you control dies, put a +1/+1 counter on Funerary Barge.
Crew 1 (Tap any number of creatures you control with total power 1 or greater: This Vehicle becomes an artifact creature until end of turn.)

Whenever target creature deals combat damage to a player this turn, create a token that's a copy of it.

When Gusma's Artisan enters, search your library for a card, then shuffle and put that card on the bottom of it.
{2}{U}, Sacrifice Gusma's Artisan: 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.)

Flying
Dragonwrought Engineer gets +1/+1 for each artifact and enchantment you control.

Enchant creature
When Strike Fear enters, draw a card.
When enchanted creature attacks, target creature can't block this turn.

Put up to one target permanent card from your graveyard on top of your library. (Then exile this card. You may play the land later from exile.)

Choose one or both —
• Scene to Cinders deals 2 damage to each token creature.
• Scene to Cinders deals 2 damage to each nontoken creature.

Search target opponent's library for an artifact card and put it onto the battlefield under your control, then that player shuffles. If you don't put a card onto the battlefield this way, create four Gold tokens. At the beginning of the next end step, sacrifice each artifact put onto the battlefield this way. (This includes the Gold.)