msem-instigator

When Viking Greataxe enters, attach it to target creature you control.
Equipped creature gets +2/+1.
Equip {3}

Target player sacrifices a creature.
Create a Vial token. (It's an artifact with “{1}, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”)

When Vile Weavers enters, if you control an enchantment, target player loses 3 life.

When Village Courier enters, look at the top four cards of your library. You may reveal an artifact, enchantment, or land card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

Target opponent exiles two cards from their hand. If that player is cursed, they lose 3 life.

Tithe (When this creature enters, you may tap three other artifacts and/or creatures you control.)
When Vindictive Abbot enters, you may have target creature get -1/-1 until end of turn. If Vindictive Abbot's tithe was paid, destroy that creature.

Rhapsody {3}{R}{R} (Pay {3}{R}{R} to cast this as a 4/4, or as a sorcery to make it become a 4/4.)
Whenever Vindictive Guardian or another creature you control enters, if that creature's power is 4 or greater, create a Treasure token.

As long as Vinehorn Stag has a +1/+1 counter on it, it can't be blocked by more than one creature.

Destroy target nontoken artifact. Create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

As an additional cost to cast this spell, sacrifice an artifact or creature.
Create three 1/1 red Construct creature tokens.

When Viork Woods Butcher enters, if you control another Warrior, target opponent loses 2 life.

Target creature gains deathtouch until end of turn.
Draw a card.

Defender
When Virtual Access Point enters, create a Function token with “Target player mills four cards.” (It's an enchantment. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)

{2}, {T}, Sacrifice Virtual Terrain: Search your library for a land card, put it onto the battlefield tapped, then shuffle.

When Virtue of Propriety enters, return target creature card with mana value 3 or less from your graveyard to your hand.

Virtuoso's Parlor enters tapped.
When Virtuoso's Parlor enters, look at the top card of your library. You may put it into your graveyard.
{T}: Add {W} or {B}.

Draw two cards, then discard two cards.
Agonize (You may cast this card from your graveyard by putting a -1/-1 counter on a creature you control in addition to paying its other costs. Then exile this card.)

Flash
When Visage of Hope enters, you gain 3 life.

Target creature you control deals damage equal to its power to target creature you don't control.

Enchant creature
Enchanted creature blocks each combat if able.
Whenever enchanted creature attacks, it loses flying until end of turn.

Golden age (If you cast an instant or sorcery spell, activated a nonmana ability, and attacked this turn, enter a renaissance for this game.)
Draw two cards. Then if you're in a renaissance, each opponent loses 2 life and you gain 2 life. Otherwise, you lose 2 life.

When Visiting Dignitary enters, gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn.

Adorned — Visserine's Royal Guard has lifelink as long as it's equipped and/or enchanted.

This spell costs {2} less to cast if you control an embattled creature. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)
Destroy target tapped creature.