msem-instigator

Vitalhydra enters with twice X +1/+1 counters on it.
Each other creature you control enters with a number of additional +1/+1 counters on it equal to the number of +1/+1 counters on Vitalhydra.

Vithian Arcanist gets +2/+0 and has haste as long as you've cast an instant or sorcery spell this turn.
When Vithian Arcanist enters, add {U}{B}{R}. Spend this mana only to cast instant and/or sorcery spells.

Eureka! (At the beginning of each end step, you get a research counter if you cast a spell this turn. Then if you have eight or more research counters, remove them and create a Masterpiece token of your choice.)
Whenever an artifact you control enters, up to two target creatures get +1/+0 and haste until end of turn.

When Vivid Hallucination blocks or becomes blocked, return it to its owner's hand.

Create a token that's a copy of target creature or land you control, except it has haste and “At the beginning of the end step, exile this permanent.” If a land you control was targeted this way, create two of those tokens instead.

At the beginning of your end step, if you gained life this turn, you gain 2 life.
Pay 3 life: Target attacking creature gains indestructible until end of turn.

When Voice of Revolution enters, Rebel creatures you control get +1/+0 and gain haste until end of turn.

Crystallize. (Put a +1/+1 counter on a creature you control or create a Treasure.)
Voice of the Universe deals 2 damage to each creature.

Target creature gets +X/+X and gains vigilance until your next turn, where X is the number of creatures you control.

Discard a card: Search your library for a card with the same mana value as the discarded card, reveal it, put it into your hand, then shuffle. Activate only as a sorcery and only once each turn.

If you would draw a card while your library has no cards in it, you win the game instead.

At the beginning of each opponent's upkeep, if that player owns a card in exile, they lose 1 life and you gain 1 life.
At the beginning of your upkeep, if you own a card in exile, you gain 1 life and each opponent loses 1 life.

Vigilance
Whenever you make first contact, put a +1/+1 counter on Volarian Sightseer. (You make first contact the first time each turn you cast a spell with a name not in your graveyard or control already.)

Volcanic Catastrophe deals 3 damage to any target. If a permanent dealt damage this way would die this turn, instead exile it and its controller's graveyard.

Whenever you innovate, put a loyalty counter on Volta the Innovator. (You innovate as you cast a spell, draw a card, or have a land enter beyond the first of each in a turn.)
[–2]: If you would draw a card this turn beyond the first, draw twice that many cards instead.
[–3]: Whenever you cast your second spell this turn, copy it. You may choose new targets for the copy.

Eureka! (At the beginning of each end step, you get a research counter if you cast a spell this turn. Then if you have eight or more research counters, remove them and create a Masterpiece token of your choice.)
[+1]: Untap up to one target artifact you control.
[–2]: Draw three cards. Then discard two cards unless you discard an artifact card.

{1}{B}, Sacrifice another creature: Put a +1/+1 counter on Voracious Ghoul.

Equipped creature gets +2/+2.
Whenever equipped creature attacks, exile target nonland permanent defending player controls. For as long as that card remains exiled, its owner may cast it. (They still pay its costs.)
Equip {2}

[+1]: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
[–3]: You get an emblem with “{1}{G}: You may play an additional land this turn.”
[–6]: Creatures you control gain trample and have base power and toughness X/X until end of turn, where X is the number of lands you control.

Adorned — As long as Voyaging Devout is equipped and/or enchanted, creatures with power less than its power can't block it.

Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.)
Whenever you cast a spell during an opponent's turn, tap target nonland permanent.

Overcast — Whenever you cast a spell, create a 1/1 black Bird creature token with flying and menace if {C} was spent to cast it.
Whenever three or more creatures you control deal combat damage to a player, return target card from your graveyard to your hand.

{T}: Add {B}.
{B}, {T}: Target creature gains menace until end of turn.

Whenever another non-Zombie creature you control dies, create a tapped 2/2 black Zombie creature token.
{B}, Sacrifice a creature: Target creature gains deathtouch until end of turn.