msem-instigator

Target creature you control gets +1/+0 and gains menace until end of turn. (That creature can only be blocked by two or more creatures.)
Draw a card.

Other Elves you control get +1/+1.
Whenever another Scout you control deals combat damage to a player, you may reveal the top card of your library. If it's a land card, put it onto the battlefield tapped.

Finale of Cinders deals 2 damage to any target. For each instant and sorcery card in your graveyard, you may pay {R}. Whenever you do, Finale of Cinders deals 2 damage to any target.

Haste (This creature can attack and {T} as soon as it comes under your control.)
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

You may cast this spell without paying its mana cost if it's the only card in your hand.
Counter target spell.

As an additional cost to cast this spell, sacrifice a creature.
Exile target creature.

Flying
When Hallowed Executioner enters, it deals 2 damage to each creature without flying.

Concord — {T}: Tap target nonland permanent. Activate only if there are four or more card types among permanents you control.

First strike
Engage (This creature must be blocked each combat if able.)

Whenever you cast a spell, you may pay 3 life. If you do, draw a card.

When Into the Lion's Den enters, target opponent reveals their hand. You choose a nonland card from it and exile that card until Into the Lion's Den leaves the battlefield.

When Viashino Glutton enters, you may have it consume. If you do, create two 1/1 red Goblin creature tokens. (To consume, sacrifice another creature or exile a creature card from your graveyard.)

Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.)
Whenever Protective Patron extorts a creature spell, that creature gains indestructible until your next turn.

Enchant creature
Harness (You may tap a creature you control as you cast this spell. If you do, reduce this spell's mana cost by that creature's power.)
Enchanted creature doesn't untap during its controller's untap step.

{R/G}: Fento, Nova Crusader gains haste and trample until end of turn.
Whenever Fento, Nova Crusader attacks, you may put a creature card from your hand onto the battlefield tapped and attacking. If you do, sacrifice that creature at the beginning of the next end step.

Flying
{3}{W}: Scry 2. You gain 2 life.

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.

Flying, first strike

Creatures you control get +2/+1 until end of turn.
Cycling {1}{W} ({1}{W}, Discard this card: Draw a card.)

Vial of Ice enters tapped.
{1}, {T}, Sacrifice Vial of Ice: Tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.

Prowess, trample
Whenever Brilliant Diviner deals combat damage to a player, draw a card.

As Wayward Wanderers enters, you may have it become X/X with ward {X} and “Other creatures you control have base power and toughness X/X.”
{1}{G}: Return Wayward Wanderers to its owner's hand.

({T}: Add {R} or {W}.)
Whenever Forgotten Steppe becomes tapped, you lose 1 life unless you control two or more basic lands.

At the beginning of your upkeep, you may pay {G}. If you do, you may put a +1/+1 counter on target creature you control and you gain 2 life.