msem-instigator

Siphon (Each -1/-1 counter you put on your creatures up to their remaining toughness while casting this pays for {1}.)
Search your library for up to two Forest cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

Whenever Desperate Thief deals combat damage to a player, you may pay 2 life. If you do, draw a card.

As an additional cost to cast this spell, pay {2} or sacrifice a creature.
Flying, vigilance

Haste
Fleeting {B} (You may cast this spell for its fleeting cost. If you do, sacrifice it at the beginning of the next end step.)

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

Assault {1}{B} (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, you may have target creature get -2/-2 until end of turn.

Flying
Whenever another creature dies, each opponent loses 1 life and you gain 1 life.

Rapport — Whenever Desraen, Serpent's Will and at least one other creature you control become tapped, you may cast target instant or sorcery card with mana value 3 or less from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead.

Target opponent loses 1 life for each creature they control. You gain 2 life for each Wizard you control.

Align X (Choose modes with total ★ less than or equal to X. You may choose modes multiple times.)
• ★ — Create a 1/1 white Soldier creature token.
• ★★ — Put a +1/+1 counter on each creature you control.
• ★★★★★ — Exile each permanent your opponents control. Return them to the battlefield under their owner's control at the beginning of your next upkeep.

Target creature you control deals damage equal to its power to target creature or planeswalker you don't control. Scry 1.

Counter target spell unless its controller pays {3}. If you own a foretold card in exile, counter that spell unless its controller pays {6} instead.

When Destiny Beyond Measure enters, tap each creature you control.
Creatures you control get +8/+8 and have “This creature enters tapped.”

As an additional cost to cast this spell, you may sacrifice a creature.
Return to the battlefield a creature card in your graveyard that was put there from the battlefield this turn.

For each creature that's attacking you or a planeswalker you control, create a 1/1 blue Bird creature token with flying.

As Destroyed Isle enters, you may pay 3 life. If you don't, it enters tapped.
{T}: Add {W}, {U}, or {B}.

Archive 4 (As this enters, shuffle the top four cards of your main library into a new face up library. Sacrifice this after the archived library is empty.)
At the beginning of each opponent's upkeep, that player may pay 2 life. If they do, you gain 2 life. Otherwise, you draw a card from the archived library.

Each opponent sacrifices an artifact, an enchantment, and a creature with flying.

Flying
Whenever you cast your second spell each turn, put a +1/+1 counter on Detached Specters.

Whenever one or more creatures you control deal combat damage to a player or planeswalker, you draw a card and you lose 1 life.

Determined Chevalier has vigilance as long as it's embattled. (A creature is embattled if it has a counter on it or a permanent you control attached to it.)

Tithe (When this creature enters, you may tap three other artifacts and/or creatures you control.)
Menace, lifelink
When Determined Evangelist's tithe is paid, put two +1/+1 counters on it.

Menace
{1}{B}, Exile another three cards from your graveyard: Return Determined Explorer from your graveyard to your hand.

Whenever Determined Hero attacks, upgrade it. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Respawn (When this creature dies, if it attacked this turn, return it to its owner's hand.)

{2}{B}, Sacrifice Determined Slayer: Exile up to three target cards from target player's graveyard. They lose that much life.