msem-instigator

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.

At the beginning of your first main phase, exile the top card of your library. Until end of turn, you may play that card.
Invocation — Whenever you spend four or more mana to cast a spell or activate an ability during your turn, create a 3/1 red Elemental Spirit creature token with trample and haste.

Creatures you control gain haste and trample until end of turn.
Draw a card.

Volcanic Rain deals damage to target creature or planeswalker equal to the number of lands you control.

Trample
Volcanic Terror gets +1/+1 for each land card in all graveyards and in exile.

Ferocious — When Volcanic Whelp enters, if you control a creature with power 4 or greater, Volcanic Whelp gets +3/+0 and gains haste until end of turn.

When Volcano Elemental dies, it deals 2 damage to any target.

Legacy (You may play this side of this card only from your graveyard. Exile it if it would be put into a graveyard or not resolve.)
Volcano Sacrifice deals damage to target creature or planeswalker equal to the number of creature cards in your graveyard.

Flying, haste
Volcano Tyrant enters with a first strike counter on it.
{2}{R}, Remove a first strike counter from Volcano Tyrant: Double its power and it gains trample until end of turn.

When Voldaren Crypt-Guard enters, create a Weapon token. (It's an Equipment artifact with “Equipped creature gets +1/+1” and equip {2}.)

Attacking creatures you control get +1/+0.
{2}{R}: Return Voldaren Heartslicer from your graveyard to the battlefield transformed under your control attached to target opponent. Activate only as a sorcery.

Lifelink
Creature tokens you control get +1/+0.
Whenever a token you control enters, each opponent loses 1 life and you gain 1 life. This ability triggers only once each turn.

When Voliv Ritualist enters, choose two different basic land types. Create a tapped colorless land token that's the chosen types. When Voliv Ritualist is no longer on the battlefield, sacrifice a land.

Reach
Wanderlust — Voliv Skyhunter gets +2/+0 and has first strike as long as you control four or more differently named lands.

Vollta Patrician gets +1/+1 as long as you control a Forest.
{1}{G}: Regenerate Vollta Patrician. (The next time this creature would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)

Haste
When Volt Vermin enters, it deals damage to target player or planeswalker equal to the number of creatures with flash and/or haste you control.

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.

When Voltaic Conduit enters, it deals 5 damage to target creature or planeswalker you don't control.
Whenever you attack, you may discard a card. If you do, draw a card.

Vigilance

Colossal 3—{7}{G} (You may cast this for its colossal cost to have it enter with three +1/+1 counters; or pay {7}{G} as a sorcery: Put three +1/+1 counters on it if it has none.)
When Voracious Asvosydna's colossal ability puts one or more counters on it, you gain 5 life.

{B}, {T}, Sacrifice a creature: Draw a card. If that creature had flying, put a flying counter on a creature you control. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance.

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

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

Reveal cards from the top of your library until three creature and/or land cards are revealed this way. Put all creature and/or land cards revealed this way into your hand and the rest into your graveyard.