msem-instigator

Whenever an opponent discards a card, exile it. You may cast that card as long for as it remains exiled, and you may spend black mana as though it were mana of any color to cast that spell.

Menace
{3}{B}, Discard a card: Unhallowed Singers gets +3/+0 until end of turn. Whenever it deals combat damage to a player this turn, they discard a card.

{1}{B}, Sacrifice a creature or enchantment: Draw a card.
{4}{B}{B}, {T}: Return target creature or enchantment card from your graveyard to the battlefield with a veil counter on it. That permanent gains “If this permanent would leave the battlefield, exile it instead.”

Reach
{T}: Adorned Flamebinder deals 1 damage to any target. Activate only if Adorned Flamebinder is embattled. (A creature is embattled if it has a counter on it or a permanent you control attached to it.)

Haste
Frenzy 3 (Whenever this creature attacks and isn't blocked, it gets +3/+0 until end of turn.)
Whenever Anaz, Bloodmother attacks, create a 2/1 red Lizard creature token with frenzy 2 that's tapped and attacking.

Reach (This creature can block creatures with flying.)
Whenever a land you control enters, Rammanethi Sandshaper deals 1 damage to target creature with flying.

Defender
{T}: Scale-Crown Archer deals 1 damage to each opponent.
Prismatic — Whenever you cast a multicolored spell, untap Scale-Crown Archer.

Menace (This creature can't be blocked except by two or more creatures.)
Engage (This creature must be blocked each combat if able.)

Double strike
Battalion — Whenever Voracious Howler and at least two other creatures attack, Voracious Howler gets +2/+0 until end of turn.

Poisonous 1 (Whenever this creature deals combat damage to a player, that player gets a poison counter.)
At the beginning of your upkeep, destroy target artifact or enchantment if its controller is poisoned.

Reach
Concord — Am'atambi's Fangs gets +1/+0 and has deathtouch as long as there are four or more card types among permanents you control.

At the beginning of your first main phase, add an amount of {G} equal to Bloomhorn's power.

Reach (This creature can block creatures with flying.)
Whenever Deepwood Spider blocks a creature with flying, Deepwood Spider gains deathtouch until end of turn.

Defender
Foliage Hunter has deathtouch as long as you've cast a spell this turn.

Vigilance
Whenever the final chapter ability of a Saga you control resolves, you may return a non-Saga card at random from your graveyard to your hand.

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

At the beginning of combat on your turn, if you control six or more lands, put a +1/+1 counter on target creature you control.

Flash (You may cast this spell any time you could cast an instant.)
Reach (This creature can block creatures with flying.)

Vigilance
Whenever a creature you control survives damage, it explores. (Reveal the top card of your library. Put it into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then you may put that card in your graveyard.)

Flying, vigilance, lifelink
Idyllic Pegasus gets +1/+0 for each artifact and/or enchantment you control.

Whenever Student of Winds attacks, upgrade target attacking creature. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Flying

Flying, vigilance
If a nonland permanent entering the battlefield would cause a triggered ability of a permanent you control to trigger, you may have that ability trigger an additional time. If you do, each opponent copies that ability and may choose new targets for the copies.

{2}{U}{B}, Sacrifice a creature: Return target creature card from your graveyard to the battlefield with a finality counter on it. It gains myriad. (Whenever it attacks, for each opponent other than defending player, you may put a token that's a copy of this creature onto the battlefield tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

The second spell you cast each turn costs {2} less to cast.
Whenever you cast a spell, each opponent loses 1 life and you gain 1 life.

Deathtouch
Whenever a creature you don't control dies, choose one —
• Create a Treasure token.
• You draw a card and you lose 1 life.