msem-instigator

When Veins of the Intisuyu enters, draw a card, then choose a card name.
Whenever you cast a spell with the chosen name, search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Lifelink
Prevent all combat damage that would be dealt to embattled creatures you control. (A creature is embattled if it has a counter on it or a permanent you control attached to it.)

Whenever you cast a noncreature spell, torment each opponent. (They lose 3 life unless they discard a card or sacrifice a nonland permanent.)
{3}{U/B}{U/B}: Draw a card for each opponent with ten or more cards in their graveyard. You lose that much life.

[+2]: Destroy up to one target monocolored permanent.
[–3]: Create an 8/8 Elemental creature token with flying, first strike, vigilance, trample, and lifelink that's all colors.
[–5]: Draw three cards. You pay {0} rather than pay the mana cost for the next spell you cast this turn.

As this permanent transforms into Velir, put four loyalty counters on it.
[+1]: Draw two cards, then discard two cards unless you discard a land card.
[–2]: Search your library for a multicolored card, reveal it, put it into your hand, then shuffle.
[–4]: Exile target permanent.

Enchant creature
Enchanted creature gets +2/+2.
At the beginning of combat on your turn, enchanted creature gains your choice of flying, vigilance, or lifelink until end of turn.

Defender
Venerable Loremaster can attack as though it didn't have defender if it's in a pack. (Two or more creatures you control with equal power are in a pack.)

Flash
Spirited (When this creature enters, you may activate one of its activated abilities without paying its cost.)
{T}: Target creature gets +0/+4 until end of turn.

Venerated Beast can't be blocked by more than one creature.

Adorned — At the beginning of your end step, if Venerated Knight is equipped and/or enchanted, put a +1/+1 counter on it.

Flying
Whenever Venerated Sanctity deals combat damage to a player, put a faith counter on it. Then you may pay {X}{W} and sacrifice Venerated Sanctity. When you do, exile target nonland permanent with mana value less than or equal to X plus the number of faith counters on Venerated Sanctity.

Haste
Whenever you cast a noncreature spell, put a +1/+1 counter on Vengeant Precursor. It gains trample until end of turn.

Whenever a creature you control dies, Vengeant Souls deals 1 damage to any target.

Lifelink
Whenever a creature without a bounty counter on it dies, you may pay 1 life. When you do, post a bounty on target creature. (Put a bounty counter on that creature. It has “When this creature dies, each opponent draws a card” as long as it has a bounty counter on it.)

Whenever a Survivor you control dies, each opponent loses 1 life and you gain 1 life.

Flash
Flying
Sacrifice Vengeful Messenger: Counter target noncreature spell unless its controller pays {2}.

Opponents drawing a card during your turn causes one death knell of a permanent you control to trigger.
Death knell — Spells target opponent casts this turn cost {1} more to cast. (As a creature you control dies, trigger one death knell of that creature or another permanent you control.)

Equipped creature gets +1/+0.
Equipped creature has deathtouch as long as it's attacking.
Equip {1}

Trample
Whenever a creature dies, put a +1/+1 counter on Venomclaw Skitterer. You gain 1 life.

Deathtouch
Menagerie — When Venomfrill Familiar enters, if there are five or more creature types among creatures you control, you may destroy target creature or planeswalker.

Primal {1}{B}{B} (During your turn, you may cast this spell for {1}{B}{B} instead of playing a land.)
Deathtouch
When Venomous Gorran enters, if you cast it for its primal cost, it fights target creature.

Enchant creature
Enchanted creature gets -X/-X, where X is the number of creature cards in your graveyard.

Frenzy 1 (Whenever this creature attacks and isn't blocked, it gets +1/+0 until end of turn.)
Whenever Venomous Haploc becomes blocked, other creatures you control gain deathtouch until end of turn.

Reach (This creature can block creatures with flying.)
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)